HD64570F Renesas Electronics America, HD64570F Datasheet - Page 47

• Manufacturer Part Number: HD64570F
• Description: IC SCA SRL COMM ADAPTER 88QFP
• Manufacturer: Renesas Electronics America

Specifications of HD64570F

• Applications: ISDN
• Interface: Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Package / Case: 88-QFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Send data
1. Decode address
2. Put data on bus
3. WAIT inactive
End of cycle
WAIT active
Memory
Figure 1.19 Transmit DMA Operation (CPU modes 2 and 3)
Access memory
1. Select read with R/W
2. Put address on bus (A to A )
2. AS active
4. HDS or LDS active
End of transfer
AS, HDS and LDS inactive
Or start next cycle
Relinquish bus
Get bus
DMAC
1
SCA
If the number of bytes of data in TX
FIFO has dropped to the number set
in MSCI TX ready control register 0
(TRC0) or less, and has not subsequently
risen to the number set in MSCI TX ready
control register 1 (TRC1) + 1 or greater
MSCI response
1. Read data
2. If the number of bytes of data in
23
request)
TX FIFO after this transfer is equal to
or greater than the number set in MSCI
TX ready control register 1 (TRC1) + 1,
negate TXRDY (to inactive the DMA
DMA Request
TXRDY active
MSCI
Rev. 0, 07/98, page 31 of 453