Epson E0C6001 Technical Manual page 22

Table 4.1.1(b) I/O memory map
Register
Address
D3 D2
0 0
R
0EDH
0 IT2
R
0EFH
0 0
BUZZER
R
0F3H
P03 P02
R/W
0F6H
* 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
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Memory Map)
D1 D0 Name SR
*5
0 IK0 0
*5
0
*5
0
*4
IK0 0
*5
IT8 IT32 0
*4
IT2 0
*4
IT8 0
*4
IT32
0
R01 R00
*5
0
FOUT
*5
0
R/W
R01 0
BUZZER 0
R00 0
FOUT 0
P03 –
P01 P00
P02 –
P01 –
P00 –
*1 1 0
Yes No Interrupt factor flag (K00–K03)
Yes No
Interrupt factor flag (clock timer 2 Hz)
Yes No
Interrupt factor flag (clock timer 8 Hz)
Yes No
Interrupt factor flag (clock timer 32 Hz)
High Low
R01 output port data
ON OFF Buzzer ON/OFF control register
High Low R00 output port data
ON OFF Frequency output ON/OFF control register
*2
High Low
*2
High Low
I/O port (P00–P03)
*2
High Low
*2
High Low
Comment
I-15