HD404849 Datasheet, PDF (8/127 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

Block Diagram
HD404849 Series
D₁₁/ INT₀
R0₀/ INT₁
R0₁/ INT₂
R0₂/ INT₃
R1₀/ TOB
R1₃/ EVNB
R1₁/ TOC
R1₂/ TOD
R2₀/ EVND
R2₁/ SCK
R2₂/ SI
R2₃/ SO
AV_CC
AV_SS
AN₀
AN₁
AN₂
AN₃
R3₀/ AN₄
R3₁/ AN₅
R3₂/ AN₆
R3₃/ AN₇
V1
V2
V3
COM1
COM2
COM3
COM4
R6₀/ SEG13
to
SEG44
External
interrupt
control
cricuit
Timer A
Timer B
Timer C
Timer D
Serial
interface
A/D
converter
LCD
display
circuit
System control circuit
512 × 4-bit,
1,184 × 4-bit RAM
W (2)
X (4)
SPX (4)
Y (4)
SPY (4)
ALU
ST (1) CA (1)
A (4)
B (4)
SP (10)
Instruction
decoder
Program
counter (14)
8,192 × 10-bit, 12,288 × 10-bit,
16,384 × 10-bit ROM
D₀
D₁
D₂
D₃
High-
D₄ current
D₅ pins
D₆
D₇
D₈
D₁₀
D₁₁
/STOPC
/INT₀
R0₀ /INT₁
R0₁ /INT₂
R0₂ /INT₃
R0₃
R1₀ /TOB
R1₁ /TOC
R1₂ /TOD
R1₃ /EVNB
R2₀ /EVND
R2₁ /SCK
R2₂ /SI
R2₃ /SO
R3₀ /AN₄
R3₁ /AN₅
R3₂ /AN₆
R3₃ /AN₇
R6₀ /SEG13
R6₁ /SEG14
R6₂ /SEG15
R6₃ /SEG16
R7₀ /SEG17
R7₁ /SEG18
R7₂ /SEG19
R7₃ /SEG20
: Data bus
: Signal lines
6