UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 110
UPD78F0838
Manufacturer Part Number
UPD78F0838
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0838.pdf
(917 pages)
- Current page: 110 of 917
- Download datasheet (14Mb)
3.4.4 Short direct addressing
108
Effective address
[Function]
[Operand format]
[Description example]
[Illustration]
The memory to be manipulated in the fixed space is directly addressed with 8-bit data in an instruction word.
This addressing is applied to the 256-byte space FE20H to FF1FH. Internal RAM and special function registers
(SFRs) are mapped at FE20H to FEFFH and FF00H to FF1FH, respectively.
The SFR area (FF00H to FF1FH) where short direct addressing is applied is a part of the overall SFR area.
Ports that are frequently accessed in a program and compare and capture registers of the timer/event counter
are mapped in this area, allowing SFRs to be manipulated with a small number of bytes and clocks.
When 8-bit immediate data is at 20H to FFH, bit 8 of an effective address is set to 0. When it is at 00H to 1FH,
bit 8 is set to 1. Refer to the [Illustration] shown below.
MOV 0FE30H, A; when transferring value of A register to saddr (FE30H)
When 8-bit immediate data is 20H to FFH,
When 8-bit immediate data is 00H to 1FH,
saddr
saddrp
Identifier
15
7
1
Operation code
1
1
saddr-offset
Immediate data that indicate label or FE20H to FF1FH
Immediate data that indicate label or FE20H to FF1FH (even address only)
OP code
1
1
1
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE
1
1
0
0
8 7
1
0
= 1
= 0
1
1
1
1
0
0
Description
0
0
1
0
0
0
OP code
30H (saddr-offset)
0
Short direct memory
Related parts for UPD78F0838
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas Starter Kit for RX210
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas StarterKit for RX630
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit+ for RX63N
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
FLASH PROGRAMMER FOR RENESAS MICROCONTROLLERS
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet: