UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 94

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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3.2.3 Special Function Registers (SFRs)
manipulation instructions. The manipulatable bit units, 1, 8, and 16, depend on the special function register type.
the table are as follows.
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Unlike a general-purpose register, each special function register has a special function.
SFRs are allocated to the FF00H to FFFFH area.
Special function registers can be manipulated like general-purpose registers, using operation, transfer and bit
Each manipulation bit unit can be specified as follows.
Table 3-7. Special Function Register List gives a list of the special function registers. The meanings of items in
1-bit manipulation
Describe the symbol reserved by the assembler for the 1-bit manipulation instruction operand (sfr.bit).
This manipulation can also be specified with an address.
8-bit manipulation
Describe the symbol reserved by the assembler for the 8-bit manipulation instruction operand (sfr).
This manipulation can also be specified with an address.
16-bit manipulation
Describe the symbol reserved by the assembler for the 16-bit manipulation instruction operand (sfrp).
When specifying an address, describe an even address.
Symbol
Symbol indicating the address of a special function register. It is a reserved word in the RA78K0, and is defined
by the header file “sfrbit.h” in the CC78K0. When using the RA78K0, ID78K0-NS, ID78K0, or SM78K0, symbols
can be written as an instruction operand.
R/W
Indicates whether the corresponding special function register can be read or written.
R/W: Read/write enable
R:
W:
Manipulatable bit units
Indicates the manipulatable bit unit (1, 8, or 16). “ ” indicates a bit unit for which manipulation is not possible.
After reset
Indicates each register status upon reset signal generation.
Target
Indicates available products for a special function register.
“–”:
CAN:
DF2:
Read only
Write only
for all products.
78K0/DF2 ( PD78F0838, 78F0839, 78F0840, 78F0841, 78F0842, 78F0843, 78F0846,
78F0847, 78F0848, and 78F0849) only.
PD78F0844, 78F0845, 78F0846, 78F0847, 78F0848, and 78F0849 only.
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE