HD404669 Datasheet, PDF (9/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

Block Diagram
HD404669 Series
HMCS400 CPU
DD₀₁
ROM
RAM
DDDD₂₃₄₅
D₉
INT₀
INT₁
External interrupt
DDDD_11110123
INT₂
control circuit
INT₃
INT₄
8-bit timer A
(free-running timer)
RRR000₀₁₂
R0₃
R1₀
R1₁
RR11₂₃
TOC
8-bit timer C
RR22₀₁
R2₂
R2₃
EVND
TOD
8-bit timer D
R3₀
RRR333₁₂₃
SCK₁
SI₁
SO₁
Synchronous 8-bit
serial interface
RRR444₀₁₂
R4₃
VT_ref
TONER
TONEC
DTMF generation
circuit
RRR666₀₁₂
R6₃
R7₀
VC_ref
COMP₀
COMP₁
Comparator
RRR777₁₂₃
RR88₀₁
R8₂
R8₃
RRR999₀₁₂
R9₃
RRAA₀₁
RRDD₀₁
RE₀
: Data bus
: Signal line
9