SLRC400 Datasheet, PDF (13/130 Pages) NXP Semiconductors – I·CODE Reader IC

Philips Semiconductors
I•CODE Reader IC
Product Specification Rev. 2.0 November 2001
SL RC400
4.3 Connection to Different µ-Processor Types
The connection to different µ-Processor types is shown in the following table:
SL RC400
ALE
A2
A1
A0
NRD
NWR
NCS
D7 ... D0
Parallel Interface Type
Separated Read/Write Strobe
Common Read/Write Strobe
Dedicated
Address Bus
Multiplexed
Address Bus
Dedicated
Address Bus
Multiplexed
Address Bus
Multiplexed
Address Bus with
Handshake
HIGH
ALE
HIGH
AS
nAStrb
A2
LOW
A2
LOW
HIGH
A1
HIGH
A1
HIGH
HIGH
A0
HIGH
A0
LOW
nWait
NRD
NRD
NDS
NDS
nDStrb
NWR
NWR
R/NW
R/NW
nWrite
NCS
NCS
NCS
NCS
LOW
D7 ... D0
AD7 ... AD0
D7 ... D0
AD7 ... AD0
AD7 ... AD0
Table 4-2: Connection Scheme for Detecting the Parallel Interface Type
4.3.1 SEPARATED READ/WRITE STROBE: INTEL TYPE COMPATIBLE
Address Bus (A3...An)
Address
Decoder
Address Bus (A0...A2)
SL RC400
NCS
A0...A2
Data Bus (D0...D7)
HIGH
Read Strobe (NRD)
Write Strobe (NWR)
D0...D7
ALE
NRD
NWR
Non Multiplexed Address
Address
Decoder
LOW
HIGH
HIGH
Multiplexed Address/Data (AD0...AD7)
Address Latch Enable (ALE)
Read Strobe (NRD)
Write Strobe (NWR)
SL RC400
NCS
A2
A1
A0
D0...D7
ALE
NRD
NWR
Figure 4-1: Connection to µ-Processors with Separated Read/Write Strobes
For timing specification refer to chapter 19.5.2.1.
13
Preliminary