HD404654 Datasheet, PDF (40/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404654 Series
I/O Pin Type
Circuit
Peripheral Input/
function pins output
pins
V_CC
V_CC
Peripheral Output
function pins pins
V_CC
V_CC
V_CC
V_CC
Pull-up control signal
HLT
MIS3
Output data
Input data
SCK₁
SCK₁
Pull-up control signal
HLT
MIS3
PMOS control
signal
MIS2
Output data ^SO1
Pull-up control signal
HLT
MIS3
Pins
SCK₁
SO₁
TOC, TOD
Output data
TOC, TOD
Input
V_CC
pins
Input data
HLT
MIS3
PDR
SI₁, INT₁, EVND
SI₁, INT₁, EVND
Input data
INT₀, STOPC
INT₀, STOPC
Note: The MCU is reset in stop mode, and peripheral function selection is cancelled. The HLT signal
becomes low, and input/output pins enter high-impedance state.
D Port (D₀–D₁₃): Consist of 10 input/output pins and 2 input pins addressed by one bit. D₀–D₃ are high-
current sources, D₄–D₉ are large-current sinks, and D₁₂ and D₁₃ 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–D₁₃ 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 23).
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