I/O Memory Of Stopwatch Timer - Epson S1C63666 Technical Manual

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Stopwatch Timer)

4.10.7 I/O memory of stopwatch timer

Table 4.10.7.1 shows the I/O addresses and the control bits for the stopwatch timer.
Register
Address
D3 D2
FOUTE SWDIR FOFQ1 FOFQ0
FF06H
R/W
EDIR DKM2 DKM1
FF78H
R/W
LCURF CRNWF SWRUN SWRST
FF79H
R
SWD3 SWD2 SWD1
FF7AH
R
SWD7 SWD6 SWD5
FF7BH
R
SWD11 SWD10 SWD9
FF7CH
R
EIRUN EILAP EISW1 EISW10
FFE6H
R/W
IRUN ILAP ISW1
FFF6H
R/W
*1 Initial value at initial reset
*2 Not set in the circuit
*3 Constantly "0" when being read
SWD0–SWD3: Stopwatch timer data 1/1,000 sec (FF7AH)
Data (BCD) of the 1/1,000 sec column of the capture buffer can be read out.
The hold function of the capture buffer works by reading this data.
These 4 bits are read-only, and cannot be used for writing operations.
At initial reset, the timer data is set to "0".
SWD4–SWD7: Stopwatch timer data 1/100 sec (FF7BH)
Data (BCD) of the 1/100 sec column of the capture buffer can be read out. These 4 bits are read-only, and
cannot be used for writing operations.
At initial reset, the timer data is set to "0".
SWD8–SWD11: Stopwatch timer data 1/10 sec (FF7CH)
Data (BCD) of the 1/10 sec column of the capture buffer can be read out. These 4 bits are read-only, and
cannot be used for writing operations.
At initial reset, the timer data is set to "0".
Note: Be sure to data reading in the order of SWD0–3 → SWD4–7 → SWD8–11.
74
Table 4.10.7.1 Control bits of stopwatch timer
∗1
D1 D0 Name Init
FOUTE 0
SWDIR 0
FOFQ1 0
FOFQ0 0
EDIR 0
DKM0
DKM2 0
DKM1 0
DKM0 0
LCURF 0
CRNWF 0
SWRUN 0
R/W W
∗3
SWRST Reset
SWD3 0
SWD0
SWD2 0
SWD1 0
SWD0 0
SWD7 0
SWD4
SWD6 0
SWD5 0
SWD4 0
SWD11 0
SWD8
SWD10 0
SWD9 0
SWD8 0
EIRUN 0
EILAP 0
EISW1 0
EISW10 0
IRUN 0
ISW10
ILAP 0
ISW1 0
ISW10 0
1 0
Enable Disable FOUT output enable
Stopwatch direct input switch
0: K00=Run/Stop, K01=Lap 1: K00=Lap, K01=Run/Stop
FOUT
frequency
selection
Enable Disable Direct input enable
Key mask
selection
Request No
Lap data carry-up request flag
Renewal No Capture renewal flag
Run Stop
Stopwatch timer Run/Stop
Reset Invalid Stopwatch timer reset (writing)
Stopwatch timer data
BCD (1/1000 sec)
Stopwatch timer data
BCD (1/100 sec)
Stopwatch timer data
BCD (1/10 sec)
Enable Mask
Interrupt mask register (Stopwatch direct RUN)
Enable Mask Interrupt mask register (Stopwatch direct LAP)
Enable Mask Interrupt mask register (Stopwatch timer 1 Hz)
Enable Mask
Interrupt mask register (Stopwatch timer 10 Hz)
(R) (R) Interrupt factor flag (Stopwatch direct RUN)
Yes No
Interrupt factor flag (Stopwatch direct LAP)
(W) (W) Interrupt factor flag (Stopwatch timer 1 Hz)
Reset Invalid
Interrupt factor flag (Stopwatch timer 10 Hz)
EPSON
Comment
[FOFQ1, 0] 0 1
Frequency f /64 f /8
OSC1 OSC1
[DKM2, 1, 0] 0 1 2
Key mask None K02 K02–03
[DKM2, 1, 0] 4 5 6
Key mask K10 K10–11 K10–12
S1C63666 TECHNICAL MANUAL
2 3
f f
OSC1 OSC3
3
K02–03,10
7
K10–13