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ST7263 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. ST7263
Description  LOW SPEED USB 8-BIT MCU FAMILY with up to 16K MEMORY, up to 512 BYTES RAM, 8-BIT ADC, WDG, TIMER, SCI & I2C
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST7263
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1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST7263 Microcontrollers form a sub family of
the ST7 dedicated to USB applications. The de-
vices are based on an industry-standard 8-bit core
and feature an enhanced instruction set. They op-
erate at a 24MHz or 12 MHz oscillator frequency.
Under software control, the ST7263 MCUs may be
placed in either Wait or Halt modes, thus reducing
power consumption. The enhanced instruction set
and addressing modes afford real programming
potential. In addition to standard 8-bit data man-
agement, the ST7263 MCUs feature true bit ma-
nipulation, 8x8 unsigned multiplication and indirect
addressing modes. The devices include an ST7
Core, up to 16K program memory, up to 512 bytes
RAM, 19 I/O lines and the following on-chip pe-
ripherals:
– USB low speed interface with 3 endpoints with
programmable in/out configuration using the
DMA architecture with embedded 3.3V voltage
regulator and transceivers (no external compo-
nents are needed).
– 8-bit Analog-to-Digital converter (ADC) with 8
multiplexed analog inputs
– industry standard asynchronous SCI serial inter-
face (not on all products - see device summary
below)
– digital Watchdog
– 16-bit Timer featuring an External clock input, 2
Input Captures, 2 Output Compares with Pulse
Generator capabilities
– fast I2C Multi Master interface (not on all prod-
ucts - see device summary)
– Low voltage (LVD) reset ensuring proper power-
on or power-off of the device
All ST7263 MCUs are available in ROM and OTP
versions.
The ST72E631 is the EPROM version of the
ST7263 in CSDIP32 windowed packages.
A specific mode is available to allow programming
of the EPROM user memory array. This is set by a
specific voltage source applied to the VPP/TEST
pin.
Figure 1. General Block Diagram
8-BIT CORE
ALU
OSCIN
OSCOUT
RESET
PORT B
16-BIT TIMER
PORT A
PORT C
PB[7:0]
(8 bits)
PC[2:0]
(3 bits)
OSCILLATOR
Internal
CLOCK
CONTROL
RAM
(256/512 Bytes)
PA[7:0]
(8 bits)
VSS
VDD
POWER
SUPPLY
SCI*
PROGRAM
(4K/8K/16K Bytes)
I2C*
MEMORY
ADC
(UART)
USB SIE
OSC/3
LVD
WATCHDOG
VSSA
VDDA
VPP/TEST
USB DMA
USBDP
USBDM
USBVCC
OSC/4 or OSC/2
(for USB)
* not on all products (refer to Table 1: Device Summary)




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