參數(shù)資料
型號: UPD17149GTA1
廠商: NEC Corp.
英文描述: SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 小,通用4位單晶片微控制器
文件頁數(shù): 41/102頁
文件大?。?/td> 408K
代理商: UPD17149GTA1
41
μ
PD17145(A1), 17147(A1), 17149(A1)
13.2 Registers Controlling Basic Interval Timer
The basic interval timer is controlled by the BTM mode register and watchdog timer mode register.
Figures 13-2 and 13-3 show the configuration of each register.
Figure 13-2. BTM Mode Register
Selects count pulse to BTM
System clock/16
(1 instruction execution time)
System clock/16384
(1024 instruction execution time)
System clock/4096
(256 instruction execution time)
System clock/512
(32 instruction execution time)
BTMCK1
0
0
1
1
BTMCK0
0
1
0
1
Resets BTM
Does not affect basic interval timer
(BTM)
Resets binary counter of basic interval
timer (BTM)
BTMRES
0
1
Selects interval timer
Sets interval timer to 1/128 of count pulse
Sets interval timer to 1/32 of count pulse
BTMISEL
0
1
Remark
Read = R, Write = W
RF : 13H
Bit 3
BTMISEL
0
Bit 2
BTMRES
0
Bit 1
BTMCK1
0
Bit 0
BTMCK0
0
BTMRES is automatically cleared to 0
after it has been set to 1. When it is read,
"0" is always read.
Read/write
Initial value at reset
R/W
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