UPD78323 NEC, UPD78323 Datasheet - Page 28

• Manufacturer Part Number: UPD78323
• Description: 16/8-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

28
2.3
are mapped in the FB00H to FFFFH area. In the FE20H to FF1FH space of the data memory, short direct addressing enables
direct addressing by 1-byte data in an instruction word.
Note When EA = L, and with the PD78323, this is external memory.
Caution For word access (including stack operations) to the main RAM area (FE00H-FEFFH), the address that
Address
FFF0H
FFF1H
FFF2H
FFF3H
FFF4H
FFF5H
FFF8H
FFF9H
In the PD78324, the internal RAM space (FB00H to FEFFH) and the special function register area (FF00H to FFFFH)
DATA MEMORY ADDRESSING
specifies the operand must be an even value.
Context switching enable register 0L
Context switching enable register 0H
Context switching enable register 1L
External interupt mode register 0
External interupt mode register 1
In-service priority register
Priority specify register
Special Function Register (SFR) Name
FDFFH
FEFFH
FFFFH
FF1FH
FE80H
FE20H
FE00H
FB00H
7FFFH
FF00H
0000H
Special Function Register
General Register
External Memory
Internal ROM
Peripheral RAM
––
Main RAM
(SFR)
Table 2-2. List of Special Function Registers (4/4)
Figure 2-6. Data Memory Addressing Space
Note
Register Addressing
SFR Addressing
CSE0H
CSE0L
CSE1L
––
Symbol
INTM0
INTM1
PRSL
ISPR
CSE0
CSE1
R/W
R/W
R/W
R
1 bit
Short Direct Addressing
––
––
Manipulable Bit Unit
8 bits
Direct Addressing
Register Indirect Addressing
Based Addressing
Paste Indexed Addressing
Paste Indexed Addressing
(Provided with Displacement)
––
16 bits
PD78323, 78324
––
––
––
––
On Reset
00H
00H
––