
ZORAN Corporation
USBvision II Data Decoder
ZR36505 Data Sheet
November-99
Page 47 of 47
RASN
CASN
WRN
OEN
tCAS
tRAS
tCSH
tRCD
tOCH
tRP
tCPRH
tCRP
DA[9..0]
ROW
ADDRESS
COLUMN
ADDRESS
COLUMN
ADDRESS
COLUMN
ADDRESS
COLUMN
ADDRESS
ROW
ADDRESS
DD[15..0]
DATA
VALID-1
tCP
tPC
tRSH
tASR
tRAH
tASC
tCAH
tDSR
tDHR
tRAD
DATA
VALID-1
DATA
VALID-1
DATA
VALID-1
6.
Camera Control Serial Port
The ZR36504 has a dedicated Programmable Serial Port intended to be used for camera
control; this port has several modes of operation, where the ZR36504 is always the bus-
master (one of the more useful modes is IICC). The programmable serial port is controlled
by the host computer via the following registers of the ZR36504 register bank:
SER_MODE, SER_ADRS, SER_CONT, SER_DAT1, SER_DAT2, SER_DAT3, and
SER_DAT4.
Camera Control uses 3 dedicated pins of the ZR36504 pinout:
IICCK is an Open Drain output pin, used to drive the serial port clock signal. It is supposed
to be connected to an external 3.3-10K
pull-up resistor to 3.3-5v.
IICDT is an Open-Drain bi-directional pin, used to send and receive the serial port data. It
is supposed to be connected to an external 3.3-10K
pull-up resistor to 3.3-5v.
SENS is an Open Drain output pin, used as a serial control strobe signal in some modes of
operation. It is supposed to be connected to an external 3.3-10K
pull-up resistor to 3.3-
5v.
There are 6 modes of operation available for the Camera Control Port. These are listed in
the following table, and described in more detail in the following paragraphs:
Mode
Number
0
Soft
Bit-level Software controlled mode
1
SIO
Serial clocked I/O
Mode Name
Description