UPD784035YGC NEC, UPD784035YGC Datasheet - Page 26

• Manufacturer Part Number: UPD784035YGC
• Description: 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS
• Manufacturer: NEC

6.2.3 Special function registers (SFRs)
are registers to which special functions are allocated. These registers are mapped to a 256-Byte space of addresses
0FF00H through 0FFFFH
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The special function registers, such as the mode registers and control registers of the internal peripheral hardware,
Note On execution of the LOCATION 0 instruction. FFF00H through FFFFFH on execution of the LOCATION
Caution Do not access an address in this area to which no SFR is allocated. If such an address is
Table 6-1 lists the special function registers (SFRs). The meanings of the symbols in this table are as follows:
• Symbol ............................... Symbol indicating an SFR.
• R/W .................................... Indicates whether the SFR is read-only, write-only, or read/write.
• Bit units for manipulation .. Bit units in which the value of the SFR can be manipulated.
• After reset .......................... Indicates the status of the register when the RESET signal has been input.
0FH instruction.
accessed by mistake, the PD784038Y may be in the deadlock status. This deadlock status can
be cleared only by inputting the RESET signal.
Note
.
(RA78K4). It can be used as an sfr variable by the #pragma sfr command with
the C compiler (CC78K4).
SFRs that can be manipulated in 16-bit units can be described as the oper-
and sfrp of an instruction. To specify the address of this SFR, describe an
even address.
SFRs that can be manipulated in 1-bit units can be described as the operand
of a bit manipulation instruction.
R/W : Read/write
R
W
: Read-only
: Write-only
PD784035Y, 784036Y, 784037Y, 784038Y
This symbol is reserved for NEC’s assembler