Toshiba DP120F, Руководство по обслуживанию

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DP120F/DP125F Circuit Description 7-56 March 2000 © TOSHIBA TEC
• DMAC GA Signal Table (3/7)
No. Signal Name Type Functions
46 IORDX O I/O read signal (active-low)
Reads data into each IC and I/O.
47 IOWRX O I/O write signal (active-low)
Writes data to each IC and I/O.
48 DMADE O DMA data enable (active-low)
Indicates to the PTC GA (IC45) that DMA transfer is
to be performed.
50 PCIDAK O PC interface DMA acknowledge signal (active-low)
Indicates to the PTC GA that DMA transfer is to be
performed with the PC interface.
51 DSCDAK O DSC DMA acknowledge signal (active-low)
Indicates to the PTC GA that DMA transfer is to be
performed with the DSC (IC59).
52 PTCDAX O PTC DMA acknowledge signal (active-low)
Indicates to the PTC GA that DMA transfer is to be
performed.
53-55 CD0-2AKX O CODEC DMA acknowledge 0-2 signals (active-low)
Indicates to the PTC GA that DMA transfer is to be
performed with the CODEC (IC51).
56 C5A0 O PIX DMA CH5 A0 signal
A0 of CH5 for PIX DMA transfer.
57 LASTO O PIX DMA CH5 last byte signal
Last transfer flag of CH5 for PIX DMA transfer.
58 TXD O UART transmit data
Transmit data to be output to the GA-1020 (PCL
PBA).
59 RTS - Unused
62 RXD I Receive data to be input from the GA-1020.
63 CTS - Signal ground (Pull down)
64, 65 FIFOC1, 0 I FIFO count 0 and 1 signals
The count data of the words to be transferred in DMA
mode is input from the PTC GA.
66 PCIDRQ I PC interface DMA request signal (active-low)
The PTC GA makes a request for DMA transfer with
the PC interface.
67 DSCDREQ I DSC DMA request signal (active-low)
The PTC GA makes a request for DMA transfer with
the DSC.
I: Input O: Output I/O: Bidirectional