GC4116 Datasheet, PDF (41/57 Pages) List of Unclassifed Manufacturers – MULTI-STANDARD QUAD DUC CHIP

GC4116 MULTI-STANDARD QUAD DUC CHIP
DATA SHEET REV 1.0
I/O CONTROL PAGE 5 (continue)
ADDRESS 20: Serial Controller Output Mode Register, suggested default = 0x51
BIT
0-3 LSB
TYPE
R/W
NAME
SCCK_RATE
4
R/W
SCCK_POL
5
R/W
SCFS_POL
6,7
R/W
SCCK_SYNC
DESCRIPTION
The SCCK output rate is set to SCCK = CK / SCCK_RATE. The serial clock is
always approximately 50% duty cycle. The serial clock changes on the rising
edge of CK when SCCK_RATE even.
Serial controller clock polarity. Inverts REQSCK. When SCCK_POL=0 and
SCCK_RATE=0, RCK is a slightly delayed version of CK.
Serial controller frame strobe polarity. If low, the frame strobe pulses high for
one SCCK period prior to the first transmitted bit. If high the frame strobe pulses
low.
Sync control for the SCCK clock. The sync settings are 0 = never; 1=SIA; 2=SIB;
3=Always.
ADDRESS 21: Serial Controller Frame Count, suggested default = 0x17
BIT
TYPE
NAME
0-7
R/W
SC_FRAME_CNT
DESCRIPTION
The initial value for the serial controller frame counter. Sets the serial controller’s
frame length.
The frame counter is preloaded with this value and held there until SCSTART. Once SCSTART is received the counter is
decremented with each SCCK clock. When the lower four bits are zero and the upper four bits match one of the
SC_FRAME_DELAY values, then the respective frame strobe is output. If unpacked then bit 4 of the counter is forced to zero
for the match, resulting in a pair of strobes separated by 16 clocks for each frame strobe delay value.
ADDRESS 22: SC Frame Delays A and B, suggested default = 0x11
BIT
TYPE
NAME
0-3
R/W
SC_FRAME_DELAY_A
4-7
R/W
SC_FRAME_DELAY_B
DESCRIPTION
Delay value for serial controller output frame strobe A.
Delay value for serial controller output frame strobe B.
ADDRESS 23: SC Frame Delays C and D, suggested default = 0x11
BIT
TYPE
NAME
0-3
R/W
SC_FRAME_DELAY_C
4-7
R/W
SC_FRAME_DELAY_D
DESCRIPTION
Delay value for serial controller output frame strobe C.
Delay value for serial controller output frame strobe D.
© 1999−2001 GRAYCHIP,INC.
- 36 -
APRIL 27, 2001
This document contains preliminary information which may be changed at any time without notice