CY7B9234
CY7B9334
Document #: 38-02014 Rev. *A
Page 2 of 32
Figure 1. SMPTE HOTLink System Connections
HOST
SERIAL LINK
HOST
CY7B9234 Transmitter Pin Configuration
43
1
2
28
8
9
7
6
5
22
21
23
24
25
1213
15
14
16
PLCC
Top View
10
11
20
19
2726
1718
FOTO
ENN
ENA
VCCQ
CKW
GND
SC/D(D a)
BISTEN
GND
MODE
RP
VCCQ
SVS(D j)
(Dh)D 7
7B9234
CY7B9334 Receiver Pin Configuration
SC/D (Qa)
43
1
2
28
8
9
7
6
5
22
21
23
24
25
1213
15
14
16
PLCC
Top View
10
11
20
19
2726
1718
REFCLK
VCCQ
SO
CKR
VCCQ
GND
RF
GND
RDY
GND
VCCN
RVS (Qj)
(Qh)Q7
7B9334
Pin Description
CY7B9234 SMPTE HOTLink Transmitter
Name
I/O
Description
D0−7
(Db − h)
TTL In
Parallel Data Input. Data is clocked into the Transmitter on the rising edge of CKW if ENA is LOW
(or on the next rising CKW with ENN LOW). If ENA and ENN are HIGH, a Null character (K28.5) is
sent. When MODE is HIGH, D0, 1, ...7 become Db, c,...h respectively.
SC/D (Da)
TTL In
Special Character/Data Select. A HIGH on SC/D when CKW rises causes the transmitter to encode
the pattern on D0−7 as a control code (Special Character), while a LOW causes the data to be coded
using the 8B/10B data alphabet. When MODE is HIGH, SC/D (Da) acts as Da input. SC/D has the
same timing as D0−7.
SVS
(Dj)
TTL In
Send Violation Symbol. If SVS is HIGH when CKW rises, a Violation symbol is encoded and sent
while the data on the parallel inputs is ignored. If SVS is LOW, the state of D0−7 and SC/D determines
the code sent. In normal or test mode, this pin overrides the BIST generator and forces the trans-
mission of a Violation code. When MODE is HIGH (placing the transmitter in unencoded mode), SVS
(Dj) acts as the Dj input. SVS has the same timing as D0−7.
ENA
TTL In
Enable Parallel Data. If ENA is LOW on the rising edge of CKW, the data is loaded, encoded, and
sent. If ENA and ENN are HIGH, the data inputs are ignored and the Transmitter will insert a Null
character (K28.5) to fill the space between user data. ENA may be held HIGH/LOW continuously or
it may be pulsed with each data byte to be sent. If ENA is being used for data control, ENN will normally
be strapped HIGH, but can be used for BIST function control.
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