UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 46

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

3.4.4 Register addressing
46
[Function]
[Operand format]
[Description example]
A general-purpose register is accessed as an operand.
The general-purpose register to be accessed is specified with the register specify code and functional name in
the instruction code.
Register addressing is carried out when an instruction with the following operand format is executed. When an
8-bit register is specified, one of the eight registers is specified with 3 bits in the instruction code.
‘r’ and ‘rp’ can be described with absolute names (R0 to R7 and RP0 to RP3) as well as function names (X, A, C,
B, E, D, L, H, AX, BC, DE, and HL).
MOV A, C; When selecting the C register for r
INCW DE; When selecting the DE register pair for rp
Identifier
rp
r
Instruction code
Instruction code
X, A, C, B, E, D, L, H
AX, BC, DE, HL
0
0
1
CHAPTER 3 CPU ARCHITECTURE
0
0
0
User’s Manual U16898EJ5V0UD
0
1
0
Description
0
0
0
1
0
1
0
1
0
1
0
0
0
1
0
Register specify code
Register specify code