SM5K3 Datasheet, PDF (3/28 Pages) Sharp Electrionic Components – 4-Bit Single-Chip Microcomputers(Controllers With 10-Bit A/D Converter)

BLOCK DIAGRAM
SM5K3/SM5K4/SM5K5
ROM
2 048-BYTE
DEC
RAM
128 x 4-BIT
DEC
X (4)
VDD
GND
OSCIN
OSCOUT
RESET
PU (5) PL (6)
BM (4) BL (4)
SR x 4
SR (8)
PRESCALER
OSC
RC RB
RA
RE
IME
INTERRUPT
CONTROLLER
INT
IFT IFA IFB
FR
R3
P0
P1
P2
P3
A (4)
C
ALU
R8
R9
A/D
VR
AGND
P4
P5
Nomenclature
A
: A register
A/D
: A/D converter unit
ALU
: Arithmetic logic unit
BM, BL
: RAM address register
C
: Carry flag
IFA, IFB, IFT : Interrupt request flag
IME
: Interrupt master enable flag
INST. DEC. : Instruction decoder
INT
: Interrupt control unit
P0-P5
: Port register
PU, PL
: Program counter
R8, R9, RC, RE, RF : Mode register
RA
: Count register
RB
: Modulo register
SB
: SB register
SR
: Stack register
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