Table 13.4 flags and transfer states (master mode) – Renesas H8S/2111B User Manual
Page 328

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