MK61FN1M0VMJ12 FREESCALE [Freescale Semiconductor, Inc], MK61FN1M0VMJ12 Datasheet - Page 43

• Manufacturer Part Number: MK61FN1M0VMJ12
• Description: K61 Sub-Family
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

which are defined as:
The SCALER value is derived from the fractional divider specified in the SIM's
CLKDIV4 register:
In case the reciprocal of SCALER is an integer, the duty cycle of NFC clock is 50%,
means T
For example, if SCALER is 0.2, then T
However, if SCALER is 0.667, then T
Freescale Semiconductor, Inc.
Num
t
t
t
t
t
t
CLS
CLH
ALS
WP
CS
CH
H
= T
The reciprocal of SCALER must be a multiple of 0.5. For
example, 1, 1.5, 2, 2.5, etc.
L
. In case the reciprocal of SCALER is not an integer:
NFC_CLE setup time
NFC_CEn setup time
NFC_WP pulse width
NFC_ALE setup time
NFC_CLE hold time
NFC_CEn hold time
K61 Sub-Family Data Sheet, Rev. 4, 10/2012.
Description
SCALER =
Table 25. NFC specifications
Table continues on the next page...
T
T
T
NFC
L
H
=
=
(1 + SCALER / 2) x
(1 – SCALER / 2) x
=
SIM_CLKDIV4[NFCFRAC] + 1
L
SIM_CLKDIV4[NFCDIV] + 1
H
T +
= 2/3 x T
L
= T
NOTE
T
T
H
T
H
T
T
NFC
NFC
L
H
T
T
= T
L
=
L
NFC
T
SCALER
NFC
input clock
Peripheral operating requirements and behaviors
T
T
2T
2T
and T
/2.
T
NFC
NFC
2
2
H
2T
H
H
T
T
+ T
H
Min.
+ T
+ T
H
L
+ T
– 1
+ T
L
L
L
H
– 1
L
– 1
– 1
L
= 1/3 x T
Max.
—
—
—
—
—
—
NFC
.
Unit
ns
ns
ns
ns
ns
ns
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