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| 型號(hào)： | S1C63653F |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, CQFP100 |
| 封裝： | CERAMIC, QFP15-100 |
| 文件頁(yè)數(shù)： | 88/121頁(yè) |
| 文件大?。?/td> | 1127K |
| 代理商： | S1C63653F |
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S1C63653 TECHNICAL MANUAL
EPSON
61
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Clock Timer)
4.9.4 I/O memory of clock timer
Table 4.9.4.1 shows the I/O addresses and the control bits for the clock timer.
Table 4.9.4.1 Control bits of clock timer
Address
Comment
D3
D2
Register
D1
D0
Name
Init 1
10
WR/W
R
FF74H
00
TMRST TMRUN
0 3
TMRST3
TMRUN
– 2
Reset
0
Reset
Run
Invalid
Stop
Unused
Clock timer reset (writing)
Clock timer Run/Stop
R
FF75H
TM3
TM2
TM1
TM0
TM3
TM2
TM1
TM0
0
Clock timer data (16 Hz)
Clock timer data (32 Hz)
Clock timer data (64 Hz)
Clock timer data (128 Hz)
R
FF76H
TM7
TM6
TM5
TM4
TM7
TM6
TM5
TM4
0
Clock timer data (1 Hz)
Clock timer data (2 Hz)
Clock timer data (4 Hz)
Clock timer data (8 Hz)
FFE5H
EIT3
EIT2
EIT1
EIT0
R/W
EIT3
EIT2
EIT1
EIT0
0
Enable
Mask
Interrupt mask register (Clock timer 1 Hz)
Interrupt mask register (Clock timer 2 Hz)
Interrupt mask register (Clock timer 8 Hz)
Interrupt mask register (Clock timer 32 Hz)
FFF5H
IT3
IT2
IT1
IT0
R/W
IT3
IT2
IT1
IT0
0
(R)
Yes
(W)
Reset
(R)
No
(W)
Invalid
Interrupt factor flag (Clock timer 1 Hz)
Interrupt factor flag (Clock timer 2 Hz)
Interrupt factor flag (Clock timer 8 Hz)
Interrupt factor flag (Clock timer 32 Hz)
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read
TM0–TM7: Timer data (FF75H, FF76H)
The 128–1 Hz timer data of the clock timer can be read out with these registers. These eight bits are read
only, and writing operations are invalid.
By reading the low-order data (FF75H), the high-order data (FF76H) is held until reading or for 0.48–1.5
msec (one of shorter of them).
At initial reset, the timer data is initialized to "00H".
TMRST: Clock timer reset (FF74HD1)
This bit resets the clock timer.
When "1" is written: Clock timer reset
When "0" is written: No operation
Reading: Always "0"
The clock timer is reset by writing "1" to TMRST. When the clock timer is reset in the RUN status, opera-
tion restarts immediately. Also, in the STOP status the reset data is maintained. No operation results
when "0" is written to TMRST.
This bit is write-only, and so is always "0" at reading.
TMRUN: Clock timer RUN/STOP control register (FF74HD0)
Controls RUN/STOP of the clock timer.
When "1" is written: RUN
When "0" is written: STOP
Reading: Valid
The clock timer enters the RUN status when "1" is written to the TMRUN register, and the STOP status
when "0" is written. In the STOP status, the timer data is maintained until the next RUN status or the
timer is reset. Also, when the STOP status changes to the RUN status, the data that is maintained can be
used for resuming the count.
At initial reset, this register is set to "0".
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