GC4116 Datasheet, PDF (37/57 Pages) List of Unclassifed Manufacturers – MULTI-STANDARD QUAD DUC CHIP

GC4116 MULTI-STANDARD QUAD DUC CHIP
DATA SHEET REV 1.0
5.5 CHANNEL INPUT PAGE (PAGE 3)
Page 3 is used to enter input data in the parallel mode (see PARALLEL_A,B,C and D in address of the IO control page).
ADDRESSES 16 to 31: Channel Inputs
ADDRESS
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
NAME
CHAN_A_I[0:7]
CHAN_A_I[8:15]
CHAN_A_QI[0:7]
CHAN_A_Q[8:15]
CHAN_B_I[0:7]
CHAN_B_I[8:15]
CHAN_B_QI[0:7]
CHAN_B_Q[8:15]
CHAN_C_I[0:7]
CHAN_C_I[8:15]
CHAN_C_QI[0:7]
CHAN_C_Q[8:15]
CHAN_D_I[0:7]
CHAN_D_I[8:15]
CHAN_D_QI[0:7]
CHAN_D_Q[8:15]
DESCRIPTION
The 8 LSBs of Channel A’s I input
The 8 MSBs of Channel A’s I input
The 8 LSBs of Channel A’s Q input
The 8 MSBs of Channel A’s Q input
The 8 LSBs of Channel A’s I input
The 8 MSBs of Channel A’s I input
The 8 LSBs of Channel A’s Q input
The 8 MSBs of Channel A’s Q input
The 8 LSBs of Channel A’s I input
The 8 MSBs of Channel A’s I input
The 8 LSBs of Channel A’s Q input
The 8 MSBs of Channel A’s Q input
The 8 LSBs of Channel D’s I input
The 8 MSBs of Channel D’s I input
The 8 LSBs of Channel D’s Q input
The 8 MSBs of Channel D’s Q input
The CHAN_INPUT_READY and CHAN_MISSED control bits in the status register (address 14) can be used as “handshake”
signals between the chip and the external processor providing the data. The external processor sets CHAN_INPUT_READY
after it has loaded the channel inputs into page 3. The chip will then clear CHAN_INPUT_READY when it has used the new
inputs. The external processor can monitor CHAN_INPUT_READY to determine when it is time to load new inputs. If the external
processor has not set CHAN_INPUT_READY when the chip wants to use the inputs, then it will set CHAN_MISSED to let the
external processor know that a handshake error has occurred and input samples have been missed.
The external processor can also use the CHREQ output as an interrupt to know new samples are needed.
© 1999−2001 GRAYCHIP,INC.
- 32 -
APRIL 27, 2001
This document contains preliminary information which may be changed at any time without notice