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ADUC834BS Datasheet(PDF) 2 Page - Analog Devices

Part # ADUC834BS
Description  MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62 kB Flash MCU
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADUC834BS Datasheet(HTML) 2 Page - Analog Devices

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ADuC834
TABLE OF CONTENTS
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . 1
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . 1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . 9
ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PIN CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 9
DETAILED BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . 10
PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . 10
MEMORY ORGANIZATION . . . . . . . . . . . . . . . . . . . . . 13
SPECIAL FUNCTION REGISTERS (SFRS) . . . . . . . . 14
Accumulator (ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
B SFR (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Data Pointer (DPTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Stack Pointer (SP and SPH) . . . . . . . . . . . . . . . . . . . . . . 15
Program Status Word (PSW) . . . . . . . . . . . . . . . . . . . . . . 15
Power Control SFR (PCON) . . . . . . . . . . . . . . . . . . . . . . 15
ADuC834 Configuration SFR (CFG834) . . . . . . . . . . . . 15
Complete SFR Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ADC SFR INTERFACE
ADCSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ADCMODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
ADC0CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADC1CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADC0H/ADC0M/ADC0L/ADC1H/ADC1L . . . . . . . . . . 20
OF0H/OF0M/OF0L/OF1H/OF1L . . . . . . . . . . . . . . . . . 20
GN0H/GN0M/GN0L/GN1H/GN1L . . . . . . . . . . . . . . . . 20
SF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
ICON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PRIMARY AND AUXILIARY ADC NOISE
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PRIMARY AND AUXILIARY ADC CIRCUIT
DESCRIPTION
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Primary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auxiliary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Primary and Auxiliary ADC Inputs . . . . . . . . . . . . . . . . . 25
Analog Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Programmable Gain Amplifier . . . . . . . . . . . . . . . . . . . . . 25
Bipolar/Unipolar Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Burnout Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Excitation Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Reference Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
-
Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ADC Chopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
NONVOLATILE FLASH/EE MEMORY
Flash/EE Memory Overview . . . . . . . . . . . . . . . . . . . . . . 28
Flash/EE Memory and the ADuC834 . . . . . . . . . . . . . . . 28
ADuC834 Flash/EE Memory Reliability . . . . . . . . . . . . . 29
Flash/EE Program Memory . . . . . . . . . . . . . . . . . . . . . . . 30
Serial Downloading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Parallel Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
User Download Mode (ULOAD) . . . . . . . . . . . . . . . . . . 30
Flash/EE Program Memory Security . . . . . . . . . . . . . . . . 31
Lock, Secure, and Serial Safe Modes . . . . . . . . . . . . . . . . 31
Using the Flash/EE Data Memory . . . . . . . . . . . . . . . . . . 31
ECON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Programming the Flash/EE Data Memory . . . . . . . . . . . . 33
Flash/EE Memory Timing . . . . . . . . . . . . . . . . . . . . . . . . 33
OTHER ON-CHIP PERIPHERALS
DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Pulsewidth Modulator (PWM) . . . . . . . . . . . . . . . . . . . . . 36
On-Chip PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Time Interval Counter (Wake-Up/RTC Timer) . . . . . . . . 40
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Power Supply Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . 44
I
2C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Dual Data Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8052 COMPATIBLE ON-CHIP PERIPHERALS
Parallel I/O Ports 0–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Timers/Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
UART Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
UART Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . 57
Baud Rate Generation Using Timer 1 and Timer 2 . . . . . 59
Baud Rate Generation Using Timer 3 . . . . . . . . . . . . . . . 60
Interrupt System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
HARDWARE DESIGN CONSIDERATIONS
External Memory Interface . . . . . . . . . . . . . . . . . . . . . . . 63
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Power-On Reset (POR) Operation . . . . . . . . . . . . . . . . . . 64
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Power Saving Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Wake-Up from Power-Down Latency . . . . . . . . . . . . . . . 65
Grounding and Board Layout Recommendations . . . . . . 65
ADuC834 System Self-Identification . . . . . . . . . . . . . . . . 66
Clock Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
OTHER HARDWARE CONSIDERATIONS
In-Circuit Serial Download Access . . . . . . . . . . . . . . . . . 67
Embedded Serial Port Debugger . . . . . . . . . . . . . . . . . . . 67
Single-Pin Emulation Mode . . . . . . . . . . . . . . . . . . . . . . . 67
Typical System Configuration . . . . . . . . . . . . . . . . . . . . . 68
QUICKSTART DEVELOPMENT SYSTEM . . . . . . . . . 69
TIMING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . 70
OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . 80


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