UPD17235 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD17235

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17230, 17231, 17232, 17233, 17234, 17235, 17236

(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 areayÏ This memory area has a total of 223 nibbles (111 nibbles in BANK0 and 112 nibbles

in BANK1).

Figure 2-6. 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

0

1

2

3

4

5

6

Note 2

7 P1A

System register (SYSREG)

Note 1

Notes 1. Address 6FH of bank 1 can be used as a general-purpose data memory area.

2. Only bit 0 of address 70H of bank 1 is used. Bits 1 through 3 are fixed to 0.

Caution No data can be written to or read from the addresses 71H to 73H of BANK1.

20

Data Sheet U14360EJ1V0DS00

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