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Rev. 1.00, 05/04, page 294 of 544
Table 13.4 Flags and Transfer States (Master Mode)
MST TRS BBSY ESTP STOP IRTR AASX AL AAS ADZ ACKB ICDRF ICDRE State
1 1 0 0 0 0 0↓ 0 0↓ 0↓ 0 — 0 Idle state (flag
clearing required)
1 1 1↑ 0 0 1↑ 0 0 0 0 0 — 1↑ Start condition
detected
1 — 1 0 0 — 0 0 0 0 — — — Wait state
1 1 1 0 0 — 0 0 0 0 1↑ — — Transmission end
(ACKE=1 and
ACKB=1)
1 1 1 0 0 1↑ 0 0 0 0 0 — 1↑ Transmission end
with ICDRE=0
1 1 1 0 0 — 0 0 0 0 0 — 0↓ ICDR write with the
above state
1 1 1 0 0 — 0 0 0 0 0 — 1 Transmission end
with ICDRE=1
1 1 1 0 0 — 0 0 0 0 0 — 0↓ ICDR write with the
above state or after
start condition
detected
1 1 1 0 0 1↑ 0 0 0 0 0 — 1↑ Automatic data
transfer from
ICDRT to ICDRS
with the above
state
1 0 1 0 0 1↑ 0 0 0 0 — 1↑ — Reception end with
ICDRF=0
1 0 1 0 0 — 0 0 0 0 — 0↓ — ICDR read with the
above state
1 0 1 0 0 — 0 0 0 0 — 1 — Reception end with
ICDRF=1
1 0 1 0 0 — 0 0 0 0 — 0↓ — ICDR read with the
above state
1 0 1 0 0 1↑ 0 0 0 0 — 1↑ — Automatic data
transfer from
ICDRS to ICDRR
with the above
state
0↓ 0↓ 1 0 0 — 0 1↑ 0 0 — — — Arbitration lost
1 — 0↓ 0 0 — 0 0 0 0 — — 0↓ Stop condition
detected
[Legend]
0: 0-state retained
1: 1-state retained
—: Previous state retained
0
↓: Cleared to 0
1
↑: Set to 1