參數(shù)資料
型號(hào)： W77LE58F-25
廠商： WINBOND ELECTRONICS CORP
元件分類： 微控制器/微處理器
英文描述： 8 BIT MICROCONTROLLER
中文描述： 8-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP44
封裝： QFP-44
文件頁(yè)數(shù)： 21/81頁(yè)
文件大小： 657K
代理商： W77LE58F-25
Preliminary W77LE58
Publication Release Date: August 1999
- 21 - Revision A1
SM1_1: Serial port 1 Mode bit 1:
SM0_1 SM1_1 Mode Description
0
0
0
1
1
0
1
1
Length
8
Baud rate
4/12 Tclk
variable
64/32 Tclk
variable
0
1
2
3
Synchronous
Asynchronous 10
Asynchronous 11
Asynchronous 11
SM2_1: Multiple processors communication. Setting this bit to 1 enables the multiprocessor
communication feature in mode 2 and 3. In mode 2 or 3, if SM2_1 is set to 1, then RI_1 will
not be activated if the received 9th data bit (RB8_1) is 0. In mode 1, if SM2_1 = 1, then RI_1
will not be activated if a valid stop bit was not received. In mode 0, the SM2_1 bit controls the
serial port 1 clock. If set to 0, then the serial port 1 runs at a divide by 12 clock of the
oscillator. This gives compatibility with the standard 8052. When set to 1, the serial clock
become divide by 4 of the oscillator clock. This results in faster synchronous serial
communication.
REN_1: Receive enable: When set to 1 serial reception is enabled, otherwise reception is disabled.
TB8_1: This is the 9th bit to be transmitted in modes 2 and 3. This bit is set and cleared by software
as desired.
RB8_1: In modes 2 and 3 this is the received 9th data bit. In mode 1, if SM2_1 = 0, RB8_1 is the stop
bit that was received. In mode 0 it has no function.
TI_1:
Transmit interrupt flag: This flag is set by hardware at the end of the 8th bit time in mode 0, or
at the beginning of the stop bit in all other modes during serial transmission. This bit must be
cleared by software.
RI_1: Receive interrupt flag: This flag is set by hardware at the end of the 8th bit time in mode 0, or
halfway through the stop bits time in the other modes during serial reception. However the
restrictions of SM2_1 apply to this bit. This bit can be cleared only by software.
Serial Data Buffer 1
Bit:
7
6
5
4
3
2
1
0
SBUF1.7 SBUF1.6 SBUF1.5 SBUF1.4 SBUF1.3 SBUF1.2 SBUF1.1 SBUF1.0
Mnemonic: SBUF1
Address: C1h
SBUF1.7-0: Serial data of the serial port 1 is read from or written to this location. It actually consists
of two separate 8-bit registers. One is the receive resister, and the other is the transmit
buffer. Any read access gets data from the receive data buffer, while write accesses are
to the transmit data buffer.
ROMMAP
Bit:
7
6
5
4
3
2
1
0
WS
1
-
-
-
-
-
-
Mnemonic: ROMMAP
Address: C2h
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