參數(shù)資料
型號: S1C63455D
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, UUC105
封裝: DIE-105
文件頁數(shù): 84/119頁
文件大小: 865K
代理商: S1C63455D
S1C63455 TECHNICAL MANUAL
EPSON
59
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Programmable Timer)
4.10.6 Transfer rate setting for serial interface
The signal that is made from underflows of timer 1 by dividing them in 1/2, can be used as the clock
source for the serial interface.
The programmable timer outputs the clock to the serial interface by setting timer 1 into RUN state
(PTRUN = "1"). It is not necessary to control with the PTOUT register.
PTRUN1
Timer 1 underflow
Source clock for serial I/F
Fig. 4.10.6.1 Synchronous clock of serial interface
A setting value for the RLD1X register according to a transfer rate is calculated by the following expres-
sion:
RLD1X = fosc / (2
bps division ratio of the prescaler) - 1
fosc
: Oscillation frequency (OSC1/OSC3)
bps
: Transfer rate
(00H can be set to RLD1X)
Be aware that the maximum clock frequency for the serial interface is limited to 1 MHz when OSC3 is
used as the clock source.
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