Allwinner A20 - NFC Operation Guide

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 306 / 812
ID
Parameter
Timing
Notes
T8
Data setup time
T
T9
Data hold time
T
T10
Ready to NFC_RE#
low
3T
T11
NFC_ALE hold time
T
T12
NFC_RE# pulse width
T
T13
NFC_RE# hold time
T
T14
Read cycle time
2T
T15
Write cycle time
2T
T16
NFC_WE# high to
R/B# busy
tWB
Specified by timing configure
register(NFC_TIMING_CFG)
T17
NFC_WE# high to
NFC_RE# low
tWHR
Specified by timing configure
register(NFC_TIMING_CFG)
T18
NFC_RE# high to
NFC_WE# low
tRHW
Specified by timing configure
register(NFC_TIMING_CFG)
T19
Address to Data
Loading time
tADL
Specified by timing configure
register(NFC_TIMING_CFG)
Note: T is the clock period duration of NFC_CLK (x2).
2.2.4. NFC Operation Guide
Page Read Command Diagram