Sino Wealth SH79F3281A Manual

Enhanced 8051 Microcontroller with 24 channels Touch-key input and PWM

1. Features

◼
8 bits micro-controller with Pipe-line structured 8051
◼
Flash ROM: 32K Bytes
◼
RAM: internal 256 Bytes, external 4096 Bytes
◼
EEPROM-Like: build-in 4096 Bytes(code option)
◼
Operation Voltage:
- f = 24MHz, V = 2.7V - 5.5V
OSC DD
◼
Oscillator (code option):
- Internal RC oscillator: 24M/16MHz (± 1%)/128K
(± 10%)
◼
42/46 bi-directional I/O pins
◼
Built-in pull-up resistor for input pin (30kΩ)
◼
Eight large current driver I/O
◼
24 channels touch key input
◼
Three 16-bit timer/counters T3 and T4, T5
◼
PCA0 containing two comparison/ capture modules
◼
Two channels 12-bits PWM
◼
SPI
◼
TWI
◼
Powerful interrupt sources:
- Timer3, 4, 5, PCA0
- INT0 - 3
- INT4: 8 input
- ADC, EUART, SPI, TouchKey
- PWM, CRC, TWI, LPD, LED

2. General Description

The SH79F3281A is a high performance 8051 compatible micro-controller. The SH79F3281A can perform more fast operation
speed and higher calculation performance, if compare SH79F3281A with standard 8051 at same clock speed.
The SH79F3281A retains most features of the standard 8051. These features include internal 256 bytes RAM, Three UART
and INT0, INT1, INT2, INT3, INT4. In addition, SH79F3281A provides external 4096 bytes RAM. It also contains 32K bytes
Flash memory block for program storage.
The SH79F3281A not only include many standard communication modules, such as EUART, TWI, SPI and so on, but also
include dimming LED, 12bit ADC, PWM timer, etc.
In addition, the SH79F3281A also have Touch Key module, CRC module, Logic configurable module (LCM) built in it.
For high reliability and low cost issues, the SH79F3281A builds in Watchdog Timer, Low Voltage Reset function. And
SH79F3281A also supports two power saving modes to reduce power consumption.
◼
Internal Logic Configuration Module (LCM)
◼
Three Enhanced UART (EUART)
◼
9 analog inputs 12-bit Analog Digital Converter
◼
LED driver:
- 8 COM/16 SEG LED driver with dimming mode
◼
Built-in Low Voltage Reset (LVR) function (code option):
- LVR Voltage1: 4.1V
- LVR Voltage2: 3.7V
- LVR Voltage3: 3.1V
◼
Built-in CRC verification module, the verify size can be
selected
◼
Low Power Detect (LPD) Module with 13 level optional
◼
Support single line simulation and download
◼
CPU Machine period:
- 1 oscillator clock
◼
Built-in Watch Dog Timer (WDT)
◼
Built-in oscillator Warm-up timer
◼
Support Low power operation modes:
- Idle Mode
- Power-Down Mode
◼
Flash Type
◼
Package:
- TQFP48
- LQFP44
1
SH79F3281A
V1.0