參數(shù)資料
型號: S1R72005F00A300
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: QFP-64
文件頁數(shù): 3/47頁
文件大?。?/td> 461K
代理商: S1R72005F00A300
5. Description of Pin Functions
S1R72005B00A300/F00A300
EPSON
5
Technical Manual (Rev.1.0)
5.
Description of Pin Functions
5.1 CPU Interface
Pin Number
Symbol
Pin Name
CSP
QFP
Pin Type
Description
DMASTRB
DMA
Strobe
E7
39
I(Gated CMOS)
Strobe signal for burst DMA transfer
If unused, connect this pin to GND
(HVSS)
xDREQ
DMA Request
E9
41
O(3-state 3mA)
DMA transfer request
This is initially in a Hi-Z state.
Set the corresponding register to select
active-low or active-high settings.
xDACK
DMA
Acknowledge
D9
42
I (Gated CMOS)
DMA transfer enable
xRD
Read Strobe
D8
43
I (Gated CMOS)
CPU read strobe
xWR
Write Strobe
D7
44
I (Gated CMOS)
CPU write strobe
xCS
Chip Select
B8
45
I (CMOS)
Chip select signal
xINT
Interrupt signal
C9
46
O(3-state 3mA)
Interrupt signal to the CPU
This is initially in a Hi-Z state.
Set the corresponding register to select
Hi-Z/0 or 1/0.
xWAIT
Wait signal
C8
47
O(3-state 3mA)
Wait signal to the CPU
This is initially in a Hi-Z state.
Set the corresponding register to select
Hi-Z/0 or 1/0.
READYxWAIT
ReadySelect
H2
13
I (CMOS Schmitt)
Apply a high-level input to this pin if
xWAIT signal is used in READY mode.
This pin is already set, and its state
cannot be changed during operations.
CD15
CD14
CD13
CD12
CD11
CD10
CD9
CD8
CD7
CD6
CD5
CD4
CD3
CD2
CD1
CD0
CPU Data
B7
A7
C7
A6
B6
C5
B5
A5
B4
C4
B2
A3
B3
B1
C2
C1
50
51
52
53
54
55
56
57
59
60
61
62
63
1
2
3
I/O
(Gated CMOS 3mA)
CPU data bus
This bus is initially directed for input.
Register data is output from this bus
during reads. During writes, register
data is set by the CPU through this bus.
Shared with the DMA data bus.
CA7
CA6
CA5
CA4
CA3
CA2
CA1
CA0
CPU Address
D1
D2
E3
E2
E1
F1
F2
F3
5
6
7
8
9
10
11
12
I(Gated CMOS)
CPU address bus
This bus is used to specify a register
address.
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