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ST7SCR Datasheet(PDF) 4 Page - STMicroelectronics

Part No. ST7SCR
Description  8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST7SCR Datasheet(HTML) 4 Page - STMicroelectronics

 
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ST7SCR
4/101
1 INTRODUCTION
The ST7SCR and ST7FSCR devices are mem-
bers of the ST7 microcontroller family designed for
USB applications. All devices are based on a com-
mon industry-standard 8-bit core, featuring an en-
hanced instruction set.
The ST7SCR ROM devices are factory-pro-
grammed and are not reprogrammable.
The ST7FSCR versions feature dual-voltage
Flash memory with Flash Programming capability.
They operate at a 4MHz external oscillator fre-
quency.
Under software control, all devices can be placed
in WAIT or HALT mode, reducing power consump-
tion when the application is in idle or stand-by
state.
The enhanced instruction set and addressing
modes of the ST7 offer both power and flexibility to
software developers, enabling the design of highly
efficient and compact application code. In addition
to standard 8-bit data management, all ST7 micro-
controllers feature true bit manipulation, 8x8 un-
signed multiplication and indirect addressing
modes.
The devices include an ST7 Core, up to 16 Kbytes
of program memory, up to 512 bytes of user RAM,
up to 35 I/O lines and the following on-chip periph-
erals:
– USB full speed interface with 7 endpoints, pro-
grammable in/out configuration and embedded
3.3V voltage regulator and transceivers (no ex-
ternal components are needed).
– ISO7816-3 UART interface with Programmable
Baud rate from 372 clock pulses up to 11.625
clock pulses
– Smartcard Supply Block able to provide pro-
grammable supply voltage and I/O voltage levels
to the smartcards
– Low voltage reset ensuring proper power-on or
power-off of the device (selectable by option)
– Watchdog Timer
– 8-bit Timer (TBU)
Figure 1. ST7SCR Block Diagram
8-BIT CORE
ALU
OSCIN
OSCOUT
PA6
4MHz
CONTROL
RAM
(512 Bytes)
PROGRAM
(16K Bytes)
MEMORY
8-BIT TIMER
LVD
VPP
USBDP
USBDM
USBVCC
PORT C
PC[7:0]
PB[7:0]
PA[5:0]
SUPPLY
MANAGER
PLL
OSCILLATOR
USB
PORT B
PORT A
USB
DATA
BUFFER
(256 bytes)
DIVIDER
8 MHz
3V/1.8V Vreg
DC/DC
CRDDET
CRDIO
CRDC4
CRDC8
CRDRST
CRDCLK
PD[7:0]
ISO7816 UART
PORT D
CONVERTER
CRDVCC
SELF
WATCHDOG
LED
LED[3:0]
or 4 MHz
48 MHz
DIODE
1


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