CHAPTER 3: PERIPHERAL CIRCUITS (Special Use Output Port)
II-19
Special Use Output Port
3.3
Special use output
port memory map
Table 3.3.1 I/O memory map
*1 Initial value following initial reset
*2 Not set in the circuit
*3 Undefined
*4 Reset (0) immediately after being read
*5 Always 0 when being read
*6 Refer to main manual
Address
Comment
Register
D3
D2
D1
D0
Name
1
0
0F3H
0
0
R01
R00
0
0
R01
BUZZER
R00
FOUT
0
0
0
0
High
ON
High
ON
Low
OFF
Low
OFF
R01 output port data
Buzzer ON/OFF control register
R00 output port data
Frequency output ON/OFF control register
R/W
R
BUZZER
FOUT
0FDH
XBZR
0
XFOUT1 XFOUT0
R
XBZR
0
XFOUT1
XFOUT0
0
0
0
Buzzer frequency control
2 kHz
High
High
4 kHz
Low
Low
R/W
R/W
FOUT frequency control:
XFOUT1(0), XFOUT0(0) -> F1
XFOUT1(0), XFOUT0(1) -> F2
XFOUT1(1), XFOUT0(0) -> F3
XFOUT1(1), XFOUT0(1) -> F4
*5
*5
SR
*1
*5