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參數(shù)資料
| 型號： | SAB80C517A-N18 |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS Single-Chip Microcontroller |
| 中文描述： | 8-BIT, 18 MHz, MICROCONTROLLER, PQCC84 |
| 文件頁數(shù)： | 56/77頁 |
| 文件大?。?/td> | 1358K |
| 代理商： | SAB80C517A-N18 |
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SAB 80C517A/83C517A-5
Semiconductor Group
55
1994-05-01
Serial Interface 0
Serial Interface 0 can operate in 4 modes:
Mode 0:
Shift register mode:
Serial data enters and exits through R
×
D0. T
×
D0 outputs the shift
clock 8 data bits are transmitted/received (LSB first). The baud rate is fixed at
1/12 of the oscillator frequency.
8-bit UART, variable baud rate:
10-bit are transmitted (through T
×
D0) or received (through R
×
D0): a start
bit (0), 8 data bits (LSB first), and a stop bit (1). On reception, the stop bit
goes into RB80 in special function register S0CON. The baud rate is
variable.
9-bit UART, fixed baud rate:
11-bit are transmitted (through T
×
D0) or received (through R
×
D0): a start
bit (0), 8 data bits (LSB first), a programmable 9th, and a stop bit (1).
On transmission, the 9th data bit (TB80 in S0CON) can be assigned to the
value of 0 or 1. For example, the parity bit (P in the PSW) could be moved
into TB80 or a second stop bit by setting TB80 to 1. On reception the 9th
data bit goes into RB80 in special function register S0CON, while the stop
bit is ignored. The baud rate is programmable to either 1/32 or 1/64 of the
oscillator frequency.
9-bit UART, variable baud rate:
11-bit are transmitted (through T
×
D0) or received (through R
×
D0): a start
bit (0), 8 data bits (LSB first), a programmable 9th, and a stop bit (1). In
fact, mode 3 is the same as mode 2 in all respects except the baud rate.
The baud rate in mode 3 is variable.
Mode 1:
Mode 2:
Mode 3:
Variable Baud Rates for Serial Interface 0
Variable baud rates for modes 1 and 3 of serial interface 0 can be derived from either timer 1
or a dedicated Baudrate Generator.
The baud rate is generated by a free running 10-bit timer with programmable reload register.
Mode 1.3 baud rate = 2
SMOD
*
f
OSC
64*(2
10
-S0REL)
The default value after reset in the reload registers S0RELL and S0RELH provide a baud rate
of 4.8 kBaud (SMOD = 0) or 9.6 kBaud (SMOD = 1) at 12 MHz oscillator frequency. This guar-
antees full compatibility to the SAB 80C517.
Mode 1.3 baud rate =
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