21 / 29 page
SL811HS
Document #: 38-08008 Rev. *A
Page 21 of 29
Notes:
12. The A0 Address bit is used to access address register or data registers in I/O Mapped or Memory Mapped applications.
6.2.4
Package Markings (SL811HST-AC)
YYWW = Date code
XXXX = Product code
X.X = Silicon revision number
33
BIDIR
D6
Data 6. Microprocessor Data/(Address) Bus.
34
NC
NC
NC
35
NC
NC
NC
36
NC
NC
NC
37
NC
NC
NC
38
NC
NC
NC
39
BIDIR
D7
Data 7. Microprocessor Data/(Address) Bus.
40
IN
M/S
Master/Slave Mode Select. “1” selects Slave. “0” = Master.
41
VDD
+3.3 VDC
SL811HST-AC Device VDD Power.
42
IN
A0
A0 = “0.” Selects address pointer. Reg.A0 = “1.” Selects data buffer or
register.[12]
43
IN
nDACK
DMA Acknowledge. An active LOW input used to interface to an
external DMA controller. DMA is enabled only in slave mode. In host
mode, pin should be tied HIGH (logic “1”) .
44
OUT
nDRQ
DMA Request. An active LOW output used with an external DMA
controller. nDRQ and nDACK form the handshake for DMA data
transfers. In host mode, pin must be left unconnected .
45
IN
NRD
Read Strobe Input. An active LOW input used with nCS to Read
registers/data memory.
46
NC
NC
NC
47
NC
NC
NC
48
NC
NC
NC
Table 6-2. SL811HST-AC Pin Assignments and Definitions (continued)
Pin No.
Pin Type
Pin Name
Pin Description
SL811HST
YYWW-X.X
XXXX
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