Toshiba DP120F, Руководство по обслуживанию

Страница: 370 / 706

March 2000 © TOSHIBA TEC 7-61 DP120F/DP125F Circuit Description
• PTC GA Signal Table (1/7)
No. Signal Name Type Functions
1, 26, 49, 61, +5V - +5V
76, 89, 98,
121, 138, 155,
181, 195, 206,
220, 231
2-9, 232-239 D0-15 I/O Data bus
10, 35, 40, 60, SG - Signal ground
68, 87, 91,
100, 106, 120,
130, 147, 156,
167, 180, 194,
208, 223, 240
11 IOCS11X I PTC GA chip select signal (active-low)
Select signal for PTC GA (IC45).
12 IORDX I I/O read signal (active-low)
Reads data into each IC and I/O.
13 IOWRX I I/O write signal (active-low)
Writes data to each IC and I/O.
14 OBACKX O CODEC bus acknowledge 2 signal (active-low)
Indicates release of the bus to the CODEC (IC51).
15 ODACKX O CODEC DMA acknowledge 2 signal (active-low)
Indicates the start of DMA transfer to the CODEC.
16 ODREQ O CODEC DMA request 2 signal
The CODEC makes a request for DMA transfer.
17, 39, 115, 3.3V - +3.3V
150, 161, 174,
216
18-25, 28-34 PMOD0-15 I CODEC input data bus
Bus for data input from CODEC.
36 IBACKX O CODEC bus acknowledge 1 signal (active-low)
Indicates release of the bus to the CODEC.
37 IDACKX O CODEC DMA acknowledge 1 signal (active-low)
Indicates the start of DMA transfer to the CODEC.
38 IDREQ I CODEC DMA request 1 signal
The CODEC makes a request for DMA transfer.
41-48, 50-57 PMID0-15 O CODEC output data bus
Bus for data output to CODEC.
I: Input O: Output I/O: Bidirectional