參數(shù)資料
型號: MB89635RPF
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP64
封裝: PLASTIC, QFP-64
文件頁數(shù): 139/153頁
文件大小: 7326K
代理商: MB89635RPF
HARDWARE CONFIGURATION
2-63
(b) Serial rate control register (SRC)
This register is used to control the data transfer speed (baud rate) of the UART.
[Bit 5] CR: Clock rate
Bit 5 is used to select the asynchronous transfer clock rate. However, when the CS1 and CS0 bits are
11B, the 1/8 clock rate is selected irrespective of the value of the CR bit.
Note: The synchronous transfer clock rate is as follows irrespective of the value of the CR bit:
Clock source
Internal clock 1/2...........................................................1/2
External clock, dedicated baud rate generator .............1/1
[Bits 4 and 3] SCS1 and SCS0: Clock select
Bits 4 and 3 are used to select the clock input of the UART port. If the external or internal clock is
selected as clock input, the baud rate is a 1/16 or 1/64 clock frequency according to the value of the CR
bit (default: 11
B). For details, see 4.4.
[Bits 2 to 0] RC2 to RC0:
Bits 2 to 0 are needed only when generating a serial clock pulse with the dedicated baud rate generator.
Fourteen baud rates can be selected by these bits (default: 000B). For the baud rate setting, see 4.4.
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