SM8521 Datasheet, PDF (5/56 Pages) Sharp Electrionic Components – 8-Bit Single-Chip Microcomputer

PIN DESCRIPTION
PIN NAME
I/O
D0-D7
I/O
A0-A20
O
MCE0B
O
MCE1B
O
IOE0B
O
IOE1B
O
RDB
O
WRB
O
NMIB
I
INTB
I
VD0-7
I/O
VA0-12
O
VCE0B
O
VCE1B
O
VRDB
O
VWRB
O
P00-P07
I/O
P10-P17
I/O
P20-P27
I/O
P30-P37
I/O
RxDB
I
TxDB
O
SOUND
O
VR
I
FR
O
LP
O
XC
O
XD0-XD3
O
YD
O
DOFFB
O
X1
I
X2
O
CLK
O
OSC1
I
OSC2
O
RESETB
I
M0-M2
I
VCC, GND
I
FUNCTION
External data bus
External address bus
Chip enable 0 (Mask ROM/flash memory)
Chip enable 1 (SRAM)
I/O enable 0 (address : FF00-FFFF)
I/O enable 1 (address : FF00-FFFF)
Read strobe
Write strobe
Non-maskable interrupt
External interrupt
VRAM data bus
VRAM address bus
VRAM chip enable 0 (A000-BFFF)
VRAM chip enable 1(C000-DFFF)
VRAM read strobe
VRAM write strobe
I/O port 0
I/O port 1
I/O port 2
I/O port 3
UART data input port
UART data output port
Sound output
D/A converter reference voltage
LCD drive waveform
Display data latch pulse
Display data clock
Diaplay data
Vertical timing
Display off
Main clock input
Main clock output
System clock output
Subclock input
Subclock output
Reset
Operation Mode (usually GND)
Power supply
SM8521
-5-