Datasheet
dsPIC30F1010/202X
DS70178C-page 260 Preliminary © 2006 Microchip Technology Inc.
TABLE 21-31: I
2
C™ BUS DATA TIMING REQUIREMENTS (MASTER MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 3.3V and 5.0V (±10%)
(unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for Industrial
-40°C ≤ T
A ≤ +125°C for Extended
Param
No.
Symbol Characteristic Min
(1)
Max Units Conditions
IM10 T
LO:SCL Clock Low Time 100 kHz mode TCY / 2 (BRG + 1) — µs —
400 kHz mode TCY / 2 (BRG + 1) — µs —
1 MHz mode
(2)
TCY / 2 (BRG + 1) — µs —
IM11 THI:SCL Clock High Time 100 kHz mode TCY / 2 (BRG + 1) — µs —
400 kHz mode TCY / 2 (BRG + 1) — µs —
1 MHz mode
(2)
TCY / 2 (BRG + 1) — µs —
IM20 TF:SCL SDA and SCL
Fall Time
100 kHz mode — 300 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB 300 ns
1 MHz mode
(2)
— 100 ns
IM21 TR:SCL SDA and SCL
Rise Time
100 kHz mode — 1000 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB 300 ns
1 MHz mode
(2)
— 300 ns
IM25 TSU:DAT Data Input
Setup Time
100 kHz mode 250 — ns —
400 kHz mode 100 — ns
1 MHz mode
(2)
TBD — ns
IM26 THD:DAT Data Input
Hold Time
100 kHz mode 0 — ns —
400 kHz mode 0 0.9 µs
1 MHz mode
(2)
TBD — ns
IM30 TSU:STA Start Condition
Setup Time
100 kHz mode TCY / 2 (BRG + 1) — µs Only relevant for
repeated Start
condition
400 kHz mode TCY / 2 (BRG + 1) — µs
1 MHz mode
(2)
TCY / 2 (BRG + 1) — µs
IM31 THD:STA Start Condition
Hold Time
100 kHz mode TCY / 2 (BRG + 1) — µs After this period the
first clock pulse is
generated
400 kHz mode TCY / 2 (BRG + 1) — µs
1 MHz mode
(2)
TCY / 2 (BRG + 1) — µs
IM33 TSU:STO Stop Condition
Setup Time
100 kHz mode TCY / 2 (BRG + 1) — µs —
400 kHz mode TCY / 2 (BRG + 1) — µs
1 MHz mode
(2)
TCY / 2 (BRG + 1) — µs
IM34 THD:STO Stop Condition 100 kHz mode TCY / 2 (BRG + 1) — ns —
Hold Time 400 kHz mode TCY / 2 (BRG + 1) — ns
1 MHz mode
(2)
TCY / 2 (BRG + 1) — ns
IM40 TAA:SCL Output Valid
From Clock
100 kHz mode — 3500 ns —
400 kHz mode — 1000 ns —
1 MHz mode
(2)
——ns —
IM45 TBF:SDA Bus Free Time 100 kHz mode 4.7 — µs Time the bus must be
free before a new
transmission can start
400 kHz mode 1.3 — µs
1 MHz mode
(2)
TBD — µs
Legend: TBD = To Be Determined
Note 1: BRG is the value of the I
2
C™ Baud Rate Generator. Refer to the “Inter-Integrated Circuit™ (I
2
C)”
section in the “dsPIC30F Family Reference Manual” (DS70046).
2: Maximum pin capacitance = 10 pF for all I
2
C pins (for 1 MHz mode only).