Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-21
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
Address Comment
Register
D3 D2 D1 D0 Name SR
*1
10
0FBH
0FCH
CSDC 0 CMPDT CMPON
CLKCHG OSCC 0 IOC
R/W
R
0
1
0
CLKCHG
OSCC
0
IOC
0
0
0
CPU clock switch
OSC3 oscillator ON/OFF
I/O port P00–P03 Input/Output
LCD drive switch
Analog voltage comparator ON/OFF
Static
+ > -
ON
Dynamic
- > +
OFF
OSC3
ON
Output
OSC1
OFF
Input
*5
*5
R/W
R/W R/W
CSDC
0
CMPDT
CMPON
Comparator's voltage condition:
1 = CMPP(+)input > CMPM(-)input,
0 = CMPM(-)input > CMPP(+)input
R
Table 4.1.1 (g) I/O memory map (0FBH–0FCH)
* 1 Initial value following initial reset
* 2 Not set in the circuit
* 3 Undefined
* 4 Reset (0) immediately after being read
* 5 Constantly 0 when being read
* 6 Refer to main manual