GC5318 Datasheet, PDF (26/45 Pages) Texas Instruments – HIGH-DENSITY DIGITAL UPCONVERTER

GC5318
HIGH-DENSITY DIGITAL UPCONVERTER
SLWS187 – JULY 2006
www.ti.com
3.1 Control Data, Address, and Strobes
The control bus consists of 16 bidirectional control data lines C[0:15], six address lines A[0:5], a read
enable line RD, a write enable line WR, and a chip enable line CE. These lines usually interface to a
microprocessor or DSP chip and are intended to look like a block of memory.
Data is written by:
1. Setting up the desired address A[0:5]
2. Setting CE low,
3. Setting the desired data on C[0:15], and then
4. Pulsing WR low. Data is written when WR returns high.
3.2 MPU Timing Diagrams
3-Pin Mode (RD_N is the strobe)
WR_N
CE_N
t_UPCKL
t_UPCKH
RD_N
A(5:0)
D(15:0)
t_d(UP)
XXXX
t_h
VALID
2-Pin Mode (CE_N is the strobe, WR_N select direction)
RD_N is tied to GND
WR_N
CE_N
t_su(UPA)
t_UPCKL
A(5:0)
t_d(UP)
D(15:0)
XXXX
t_UPCKH
t_h
VALID
Figure 3-1. Read Diagrams
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GC5318 General Control