Pin Function Description; Transmit Side Pins - Dallas Semiconductor DS21354L Manual

PIN SYMBOL
40
41
50
49
14
34
35
39
42
38
43
32
47
48
52
37
51 TSYSCLK
29
31
30
77 WR*(R/W*)
22

4.1 PIN FUNCTION DESCRIPTION

4.1.1 Transmit Side Pins

Signal Name:
Signal Description:
Signal Type:
A 2.048 MHz primary clock. Used to clock data through the transmit side formatter.
Signal Name:
Signal Description:
Signal Type:
Transmit NRZ serial data. Sampled on the falling edge of TCLK when the transmit side elastic store is
disabled. Sampled on the falling edge of TSYSCLK when the transmit side elastic store is enabled.
Signal Name:
Signal Description:
Signal Type:
A 256 kHz clock which pulses high during the LSB of each channel. Synchronous with TCLK when the
transmit side elastic store is disabled. Synchronous with TSYSCLK when the transmit side elastic store is
enabled. Useful for parallel to serial conversion of channel data.
TYPE
TCLKI I
TCLKO O
TDATA I
TESO O
TEST I
TLCLK O
TLINK I
TNEGI I
TNEGO O
TPOSI I
TPOSO O
TRING O
TSER I
TSIG I
TSSYNC I
TSYNC I/O
I
TTIP O
TVDD –
TVSS –
I
XTALD O
TCLK
Transmit Clock
Input
TSER
Transmit Serial Data
Input
TCHCLK
Transmit Channel Clock
Output
DESCRIPTION
Transmit Clock Input
Transmit Clock Output
Transmit Data
Transmit Elastic Store Output
Test
Transmit Link Clock
Transmit Link Data
Transmit Negative Data Input
Transmit Negative Data Output
Transmit Positive Data Input
Transmit Positive Data Output
Transmit Analog Ring Output
Transmit Serial Data
Transmit Signaling Input
Transmit System Sync
Transmit Sync
Transmit System Clock
Transmit Analog Tip Output
Transmit Analog Positive Supply
Transmit Analog Signal Ground
Write Input(Read/Write)
Quartz Crystal Driver
15 of 117
DS21354 & DS21554