DS21354 & DS21554
13 of 117
PIN
SYMBOL
TYPE
DESCRIPTION
90
RNEGO
O
Receive Negative Data Output
91
RPOSO
O
Receive Positive Data Output
92
RCHCLK
O
Receive Channel Clock
93
RSIGF
O
Receive Signaling Freeze Output
94
RSIG
O
Receive Signaling Output
95
RSER
O
Receive Serial Data
96
RMSYNC
O
Receive Multiframe Sync
97
RFSYNC
O
Receive Frame Sync
98
RSYNC
I/O
Receive Sync
99
RLOS/LOTC
O
Receive Loss Of Sync/ Loss Of Transmit Clock
100
RSYSCLK
I
Receive System Clock
PIN DESCRIPTION BY SYMBOL
Table 4-2
PIN
SYMBOL
TYPE
DESCRIPTION
3
8MCLK
O
8.192 MHz Clock
13
8XCLK
O
Eight Times Clock
66
A0
I
Address Bus Bit 0
67
A1
I
Address Bus Bit 1
68
A2
I
Address Bus Bit 2
69
A3
I
Address Bus Bit 3
70
A4
I
Address Bus Bit 4
71
A5
I
Address Bus Bit 5
72
A6
I
Address Bus Bit 6
73
ALE(AS)/A7
I
Address Latch Enable/ Address Bus Bit 7
11
BTS
I
Bus Type Select
36
CI
I
Carry In
54
CO
O
Carry Out
75
CS*
I
Chip Select
56
D0/AD0
I/O
Data Bus Bit0/ Address/Data Bus Bit 0
57
D1/AD1
I/O
Data Bus Bit1/ Address/Data Bus Bit 1
58
D2/AD2
I/O
Data Bus Bit 2/Address/Data Bus 2
59
D3/AD3
I/O
Data Bus Bit 3/Address/Data Bus Bit 3
62
D4/AD4
I/O
Data Bus Bit4/Address/Data Bus Bit 4
63
D5/AD5
I/O
Data Bus Bit 5/Address/Data Bus Bit 5
64
D6/AD6
I/O
Data Bus Bit 6/Address/Data Bus Bit 6
65
D7/AD7
I/O
Data Bus Bit 7/Address/Data Bus Bit 7
44
DVDD
–
Digital Positive Supply
81
DVDD
–
Digital Positive Supply
61
DVDD
–
Digital Positive Supply
83
DVDD
–
Digital Positive Supply
45
DVSS
–
Digital Signal Ground
60
DVSS
–
Digital Signal Ground
80
DVSS
–
Digital Signal Ground
84
DVSS
–
Digital Signal Ground
76
FMS
I
Framer Mode Select
25
INT*
O
Interrupt
