C Bus Control Registers (Ibcr00, Ibcr10) - Fujitsu F2MC-8FX Hardware Manual

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CHAPTER 22 I C
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22.5.1 I

C Bus Control Registers (IBCR00, IBCR10)

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The I C bus control registers are used to select the operating mode and to enable or
disable interrupts, acknowledgment, general call acknowledgment, and MCU standby
wakeup function.
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I C Bus Control Register 0 (IBCR00)
Address
0060 IBCR00
H
R/W : Readable/writable
(Read value is the same as write value)
R(RM1),W : Readable/writable (Read value is different from
write value, "1" is read by read-modfy-write instruction)
: Initial value
378
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Figure 22.5-2 I
bit7 bit6 bit5 bit4
AACKX INTS ALF ALE
R/W R/W R(RM1),W R/W
C Bus Control Register 0 (IBCR00)
bit3 bit2 bit1 bit0
SPF SPE WUF WUE
R(RM1),W R/W R(RM1),W R/W
WUE
MCU standby-mode wakeup function enable bit
0
Disables the MCU standby-mode wakeup function in stop/watch mode
1
Enables the MCU standby-mode wakeup function in stop/watch mode
MCU standby-mode wakeup interrupt request flag bit
WUF
0 Start condition undetected
1
Start condition detected
SPE
Stop detection interrupt enable bit
0 Disables stop detection interrupts.
1
Enables stop detection interrupts.
Stop detection interrupt request flag bit
SPF
0 Stop condition undetected
1
Stop condition detected
ALE
Arbitration lost interrupt enable bit
0
Disables arbitration lost interrupts.
1
Enables arbitration lost interrupts.
Arbitration lost interrupt request flag bit
ALF
0
Arbitration lost undetected
1 Arbitration lost detected
INTS
Timing select bit for data reception transfer completion flag (INT)
0
1
AACKX
0
1
Initial value
00000000
B
Read
Read
Read
Sets INT in 9th SCL cycle.
Sets INT in 8th SCL cycle.
Address acknowledge disable bit
Enables address ACK.
Disables address ACK.
Write
Clear
Unchanged
Write
Clear
Unchanged
Write
Clear
Unchanged