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参数资料
| 型号： | SAB80C537-M-T85 |
| 厂商： | SIEMENS A G |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 12 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | PLASTIC, MQFP-100 |
| 文件页数： | 37/61页 |
| 文件大小： | 1054K |
| 代理商： | SAB80C537-M-T85 |
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SAB 80C517/80C537
Semiconductor Group
41
Serial Interface 1
Serial interface 1 can operate in two asynchronous modes:
Mode A:
9-bit UART, variable baud rate.
11 bits are transmitted (through TXD0) or received (through RXD0): a start bit (0),
8 data bits (LSB first), a programmable 9th, and a stop bit (1). On transmission, the
9th data bit (TB81 in S1CON) can be assigned to the value of 0 or 1. For example,
the parity bit (P in the PSW) could be moved into TB81 or a second stop bit by
setting TB81 to 1. On reception the 9th data bit goes into RB81 in special function
register S1CON, while the stop bit is ignored.
Mode B:
8-bit UART, variable baud rate.
10 bits are transmitted (through TXD1) or received (through RXD1): a start bit (0),
8 data bits (LSB first), and a stop bit (1). On reception, the stop bit goes into RB81
in special function register S1CON.
Variable Baud Rates for Serial Interface 1
Variable baud rates for modes A and B of serial interface 1 can be derived from a dedicated
baud rate generator.
The baud rate clock (baud rate =
) is generated by a 8-bit free
running timer with programmable reload register. SAB 80C517 devices with stepping code
"CA" or later provide a 10-bit free running timer for baud rate generation.
Mode A, B baud rate =
Watchdog Units
The SAB 80C517 offers two enhanced fail safe mechanisms, which allow an automatic recov-
ery from hardware failure or software upset:
– programmable watchdog timer (WDT), variable from 512 ms up to about 1.1 s time out
period @12 MHz. Upward compatible to SAB 80515 watchdog.
– oscillator watchdog (OWD), monitors the on-chip oscillator and forces the microcontroller to
go into reset state, in case the on-chip oscillator fails.
Programmable Watchdog Timer
The WDT can be activated by hardware or software.
Hardware initialization is done when pin PE/SWD (Pin 4) is held high during RESET. The
SAB 80C517 then starts program execution with the WDT running. Pin PE/SWD doesn’t allow
dynamic switching of the WDT.
Software initialization is done by setting bit SWDT. A refresh of the watchdog timer is done by
setting bits WDT and SWDT consecutively.
A block diagram of the watchdog timer is shown in figure 11.
When a watchdog timer reset occurs, the watchdog timer keeps on running, but a status flag
WDTS is set. This flag can also be manipulated by software.
baud rate clock
16
----------------------------------------
f
OSC
32
2
10
Reload Value
–
×
------------------------------------------------------------------------
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SAB80C537N | 制造商:Infineon Technologies AG 功能描述:MCU 8-Bit C500 8051 CISC ROMLess 5V 84-Pin PLCC 制造商:Infineon Technologies AG 功能描述:8BIT CPU 12MHZ SMD 80C537 PLCC84 |
| SAB80C537-N | 功能描述:IC MIRCROCONTROLLER 8BIT 84PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:260 系列:73S12xx 核心处理器:80515 芯体尺寸:8-位 速度:24MHz 连通性:I²C，智能卡，UART/USART，USB 外围设备:LED，POR，WDT 输入/输出数:9 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-VFQFN 裸露焊盘 包装:管件 |
| SAB80C537-N16 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB80C537-N-T40/85 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit CMOS Single-Chip Microcontroller |
| SAB82257N | 制造商:n/a 功能描述:82257 SIE 48 HOURS |
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