Product Data Sheet

MF1S50yyX_V1 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.0 — 3 March 2014
279230 16 of 40
NXP Semiconductors
MF1S50yyX/V1
MIFARE Classic EV1 1K - Mainstream contactless smart card IC
9.2 Timings
The timing shown in this document are not to scale and values are rounded to 1 s.
All given times refer to the data frames including start of communication and end of
communication. A PCD data frame contains the start of communication (1 “start bit”) and
the end of communication (one logic 0 + 1 bit length of unmodulated carrier). A PICC data
frame contains the start of communication (1 “start bit”) and the end of communication (1
bit length of no subcarrier).
The minimum command response time is specified according to Ref. 4
as an integer n
which specifies the PCD to PICC frame delay time. The frame delay time from PICC to
PCD is at least 87 s. The maximum command response time is specified as a time-out
value. Depending on the command, the T
ACK
value specified for command responses
defines the PCD to PICC frame delay time. It does it for either the 4-bit ACK value
specified in Section 9.3
or for a data frame.
All command timings are according to ISO/IEC 14443-3 frame specification as shown for
the Frame Delay Time in Figure 11
. For more details refer to Ref. 3 and Ref. 4.
Remark: Due to the coding of commands, the measured timings usually excludes (a part
of) the end of communication. Consider this factor when comparing the specified with the
measured times.
Fig 11. Frame Delay Time (from PCD to PICC) and T
ACK
and T
NAK
aaa-006279
last data bit transmitted by the PCD
FDT = (n* 128 + 84)/fc
first modulation of the PICC
FDT = (n* 128 + 20)/fc
128/fc
logic „1“
128/fc
logic „0“
256/fc
end of communication (E)
256/fc
end of communication (E)
128/fc
start of
communication (S)
128/fc
start of
communication (S)