PD17225_15 Datasheet, PDF (18/86 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

µPD17225, 17226, 17227, 17228
(5) General-purpose data memory
The general-purpose data memory area is an area of the data memory excluding the system register area,
and the port register area. This memory area has a total of 223 nibbles (111 nibbles in BANK0 and 112 nibbles
in BANK1).
µPD17225 and 17226 are not provided with BANK1.
Figure 2-4. Configuration of Data Memory
Column address
BANK 0
0 1 2 3 4 5 6 7 8 9 ABCDEF
0
Data buffer (DBF)
1
2
3
4
5
6
P0E
7 P0A P0B P0C P0D
System register (SYSREG)
Example
Address 1AH
in BANK 0
Column address
BANK 1
0 1 2 3 4 5 6 7 8 9 ABCDEF
System register (SYSREG)
Caution No data can be written to the addresses 70H to 73H of BANK1 (the value of P0A to P0D are read in
this case).
16
Data Sheet U12643EJ2V0DS00