ST7263 STMICROELECTRONICS [STMicroelectronics], ST7263 Datasheet - Page 5

• Manufacturer Part Number: 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
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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
– 8-bit Analog-to-Digital converter (ADC) with 8
Figure 1. General Block Diagram
* not on all products (refer to Table 1: Device Summary)
programmable in/out configuration using the
DMA architecture with embedded 3.3V voltage
regulator and transceivers (no external compo-
nents are needed).
multiplexed analog inputs
V
OSCOUT
PP
OSCIN
RESET
/TEST
V
V
V
V
DDA
SSA
DD
SS
(4K/8K/16K Bytes)
(256/512 Bytes)
OSCILLATOR
WATCHDOG
8-BIT CORE
CONTROL
PROGRAM
USB DMA
MEMORY
SUPPLY
POWER
RAM
ALU
LVD
OSC/4 or OSC/2
(for USB)
Internal
CLOCK
OSC/3
– industry standard asynchronous SCI serial inter-
– digital Watchdog
– 16-bit Timer featuring an External clock input, 2
– fast I2C Multi Master interface (not on all prod-
– Low voltage (LVD) reset ensuring proper power-
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 V
pin.
face (not on all products - see device summary
below)
Input Captures, 2 Output Compares with Pulse
Generator capabilities
ucts - see device summary)
on or power-off of the device
16-BIT TIMER
USB SIE
PORT A
PORT B
PORT C
(UART)
ADC
SCI*
I
2
C*
PA[7:0]
(8 bits)
USBDM
USBVCC
PB[7:0]
USBDP
PC[2:0]
(8 bits)
(3 bits)
ST7263
PP
/TEST
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