HD404459 Datasheet, PDF (49/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
I/O Pin Type
Circuit
Pins
Peripheral Input pins
V_CC
function
pins
HLT
MIS3
PDR
INT₀, etc
SI, INT₀, INT₁,
INT₂, INT₃,
WU₀–WU₇,
EVNB, EVND
Input data
STOPC
STOPC
Notes: 1. In stop mode, the MCU is reset and peripheral function selection is cancelled. The HLT signal
becomes low, and input/output pins enter high-impedance state.
2. The HLT signal is 1 in watch and subactive modes.
D Port (D₀–D₁₁): Consist of 10 input/output pins and 2 input pins addressed by one bit. D ₀–D₉ are
input/output pins, and D₁₀ and D₁₁ are input-only pins.
Pins D₀–D₉ are set by the SED and SEDD instructions, and reset by the RED and REDD instructions.
Output data is stored in the port data register (PDR) for each pin. All pins D₀–D₁₁ are tested by the TD and
TDD instructions.
The on/off statuses of the output buffers are controlled by D-port data control registers (DCD0–DCD2:
$02C–$02E) that are mapped to memory addresses (figure 30).
Pin D₁₁ is multiplexed with peripheral function pin STOPC. The peripheral function mode of this pin is
selected by bit 2 (PMRC2) of port mode register C (PMRC: $025) (figure 35).
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