參數資料
型號: S1C63158D0A010P
元件分類: 微控制器/微處理器
英文描述: 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, UUC53
封裝: DIE-53
文件頁數: 131/159頁
文件大小: 1200K
代理商: S1C63158D0A010P
S1C63808 TECHNICAL MANUAL
EPSON
65
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Programmable Timer)
4.9.8 Transfer rate setting for serial interface
The signal that is made from underflows of timer 2 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
(PTRUN1 = "1", or PTRUN0 = "1" in 16-bit mode). It is not necessary to control with the PTOUT register.
PTRUNx
Timer 1 underflow
Source clock for serial I/F
Fig. 4.9.8.1 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 / (32
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 2 MHz when OSC3 is
used as the clock source.
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