Rev. 1.00, 05/04, page 525 of 544
Table 22.9 I
2
C Bus Timing
Conditions: V
CC
= 3.0 V to 3.6 V, V
SS
= 0 V,
φ
= 5 MHz to maximum operating frequency,
T
a
= –20 to +75°C
Ratings
Item Symbol
Min.
Typ.
Max.
Unit
Test
Conditions Notes
SCL input cycle time
t
SCL
12 — — t
cyc
SCL input high pulse width
t
SCLH
3 — — t
cyc
SCL input low pulse width
t
SCLL
5 — — t
cyc
SCL, SDA input rise time
t
Sr
—
—
7.5
*
t
cyc
SCL, SDA input fall time
t
Sf
—
—
300
ns
SCL, SDA input spike pulse
elimination time
t
SP
—
—
1
t
cyc
SDA input bus free time
t
BUF
5 — — t
cyc
Start condition input hold time
t
STAH
3 — — t
cyc
Retransmission start condition
input setup time
t
STAS
3 — — t
cyc
Stop condition input setup time
t
STOS
3 — — t
cyc
Data input setup time
t
SDAS
0.5 — — t
cyc
Data input hold time
t
SDAH
0 — — ns
SCL, SDA capacitive load
C
b
—
—
400
pF
Figure
22.22
Note:
*
17.5
t
cyc
can be set according to the clock selected for use by the I
2
C module. For
details, see section 13.6, Usage Notes.
Содержание H8S/2111B
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