
FEDL60851D-01
1Semiconductor
ML60851D
4/83
PIN DESCRIPTION
Pin
Symbol
Type
Description
1, 2
D+, D–
I/O
USB data
6, 7
XIN, XOUT
—
Pins for external crystal oscillator
4, 5
TEST1, 2
I
Test pins (normally “L”)
13 to 16,
19 to 22
D15 to D8
I/O
Data bus (MSB)
35 to 38,
41 to 44
AD7 to AD0
I/O
Data bus (LSB)/address inputs
25 to 32
A7 to A0
I
Address inputs
8
CS
I
Chip select signal input pin. LOW active
9
RD
I
Read signal input pin. LOW active
10
WR
I
Write signal input pin. LOW active
12
INTR
O
Interrupt request signal output pin
34
DREQ
O
DMA request output pin
33
DACK
I
DMA acknowledge signal input pin
23
ALE
I
Address latch enable signal input pin
24
ADSEL
I
Address input mode select input pin. “H”: address/data multiplex
11
RESET
I
System reset signal input pin. LOW active.