Infineon AIROC CYBLE-343072-02 Manual page 42

AIROC™ Bluetooth® LE module
Timing and AC characteristics
Table 22 Timing for I
Clock Period T
HIGH t
HC
LOWt
LC
HIGH t
HC
LOW t
LC
Rise time t
RC
Delay t
dtr
Hold time t
htr
Setup time t
sr
Hold time t
hr
Notes
18.The system clock period T must be greater than T
to be able to handle the data transfer rate.
19.At all data rates in master mode, the transmitter or receiver generates a clock signal with a fixed mark/space
ratio. For this reason, t
20.In slave mode, the transmitter and receiver need a clock signal with minimum HIGH and LOW periods so that
they can detect the signal. So long as the minimum periods are greater than 0.35T
requirements can be used.
21.Because the delay (t
driven by a slow clock edge can result in t
Therefore, the transmitter has to guarantee that t
rise-time t is not more than t
RC
22.To allow data to be clocked out on a falling edge, the delay is specified with respect to the rising edge of the
clock signal and T, always giving the receiver sufficient setup time.
23.The data setup and hold time must not be less than the specified receiver setup and hold time.
Note The time periods specified in
specifications must match transmitter performance.
Preliminary Datasheet
2
S transmitters and receivers
Transmitter
Lower limit
Min Max
T –
tr
Master mode: Clock generated by transmitter or receiver
0.35T –
tr
0.35T –
tr
Slave mode: Clock accepted by transmitter or receiver
– 0.35T
tr
– 0.35T
tr
– –
– –
0 –
– –
– –
and t are specified with respect to T.
HC LC
) and the maximum transmitter speed (defined by T
dtr
not exceeding t
dtr
, where t
RCmax
Figure 17 and
Upper limit Lower limit
Min Max Min
– – T
r
– – 0.35T
tr
– – 0.35T
tr
– – –
– – –
0.15T – –
tr
Transmitter
– 0.8T –
– – –
Receiver
– – –
– – –
and T because both the transmitter and receiver have
tr r
which means t
RC
is greater than or equal to zero, so long as the clock
htr
is not less than 0.15T
RCmax
Figure 18 are defined by the transmitter speed. The receiver
42 of 58
Receiver
Upper limit
Max Min Max
– – –
– – –
– – –
0.35T – –
tr
0.35T – –
tr
– –
– – –
– – –
0.2T – –
r
0 – –
, any clock that meets the
r
) are related, a fast transmitter
tr
becomes zero or negative.
htr
.
tr
002-33419 Rev. **
Notes
18
19
19
20
20
21
22
21
23
22
2021-07-22