EFM32WG Datasheet, PDF (433/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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16.4 Register Map
The offset register address is relative to the registers base address.
Offset
0x000
0x004
0x008
0x00C
0x010
0x014
0x018
0x01C
0x020
0x024
0x028
0x02C
0x030
0x034
0x038
Name
I2Cn_CTRL
I2Cn_CMD
I2Cn_STATE
I2Cn_STATUS
I2Cn_CLKDIV
I2Cn_SADDR
I2Cn_SADDRMASK
I2Cn_RXDATA
I2Cn_RXDATAP
I2Cn_TXDATA
I2Cn_IF
I2Cn_IFS
I2Cn_IFC
I2Cn_IEN
I2Cn_ROUTE
Type
RW
W1
R
R
RW
RW
RW
R
R
W
R
W1
W1
RW
RW
Description
Control Register
Command Register
State Register
Status Register
Clock Division Register
Slave Address Register
Slave Address Mask Register
Receive Buffer Data Register
Receive Buffer Data Peek Register
Transmit Buffer Data Register
Interrupt Flag Register
Interrupt Flag Set Register
Interrupt Flag Clear Register
Interrupt Enable Register
I/O Routing Register
16.5 Register Description
16.5.1 I2Cn_CTRL - Control Register
Offset
0x000
Reset
Access
Bit Position
Name
Bit
31:19
18:16
15
Name
Reset
Access Description
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
CLTO
0x0
RW
Clock Low Timeout
Use to generate a timeout when CLK has been low for the given amount of time. Wraps around and continues counting when the
timeout is reached.
Value
0
1
2
3
4
5
Mode
OFF
40PCC
80PCC
160PCC
320PPC
1024PPC
Description
Timeout disabled
Timeout after 40 prescaled clock cycles. In standard mode at 100 kHz, this results in
a 50us timeout.
Timeout after 80 prescaled clock cycles. In standard mode at 100 kHz, this results in
a 100us timeout.
Timeout after 160 prescaled clock cycles. In standard mode at 100 kHz, this results
in a 200us timeout.
Timeout after 320 prescaled clock cycles. In standard mode at 100 kHz, this results
in a 400us timeout.
Timeout after 1024 prescaled clock cycles. In standard mode at 100 kHz, this results
in a 1280us timeout.
GIBITO
0
RW
Go Idle on Bus Idle Timeout
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
433
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