CLRC632 Datasheet, PDF (16/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
4.3.3 COMMON READ/WRITE STROBE AND HAND-SHAKE MECHANISM: EPP
LOW
HIGH
HIGH
nWait
Multiplexed Address/Data (AD1...AD8)
Address Strobe (nAStrb)
Data Strobe (nDStrb)
Read/Write (nWrite)
CL RC632
NCS
A2
A1
A0
D0...D7
ALE
NRD
NWR
Figure 4-3: Connection to µ-Processors with Common Read/Write Strobes and Hand-Shake
For timing specification refer to chapter 22.5.2.3.
Remarks for EPP:
Although in the standard for the EPP no chip select signal is defined, the N_CS of the CL RC632 allows
inhibiting the nDStrb signal. If not used, it shall be connected to DVSS.
After each Power-On or Hard Reset the nWait signal (delivered at pin A0) is high impedance. nWait will be
defined at the first negative edge applied to nAStrb after the Reset Phase.
The CL RC632 does not support Read Address Cycle.
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