TCM8002_08 Datasheet, PDF (8/25 Pages) Texas Instruments – DATA PROCESSOR FOR CELLULAR TELEPHONE

TCM8002
DATA PROCESSOR FOR CELLULAR TELEPHONE
SLWS008C − SEPTEMBER 1994 − REVISED JUNE 1996
PARAMETER MEASUREMENT INFORMATION
Figure 1 shows the timing for processor read and write operations. DATAOUT has a 3-state driver and normally
presents the high-impedance state as shown in Figure 1. This allows DATAIN and DATAOUT be be tied together to
a bidirectional microprocessor pin.
CS
Write
DCLK
tsu2
DATAIN
Start
Bit
tsu1
th1
1
23
45
67
81
2
34
56
7
8
th2
1 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
Write Address
Write Data
CS
DCLK
1
23
45
6
7
81
23
4
9 10 11 12
tc
Read
DATAIN
Start
Bit
0 _{A6 A5 A4 A3 A2 A1 A0}
Read Address
DATAOUT
(from event register)
tc(er)
0 Q11 Q10 Q9
Q3 Q2 Q1 Q0
Read Data
DATAOUT
(from any other register)
tc(or)
Read Start Bit
0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
Read Data
Figure 1. Microprocessor-Interface Timing
8
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443