C (I2C); Overview - Epson S1C17W12 Technical Manual

14 I

C (I2C)

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14.1 Overview

The I2C is a subset of the I
• Functions as an I C bus master (single master) or a slave device.
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• Supports standard mode (up to 100 kbit/s) and fast mode (up to 400 kbit/s).
• Supports 7-bit and 10-bit address modes.
• Supports clock stretching.
• Includes a baud rate generator for generating the clock in master mode.
• No clock source is required to run the I2C in slave mode, as it can run with the I
• Slave mode is capable of being operated in SLEEP mode allowing wake-up by an interrupt when an address
match is detected.
• Master mode supports automatic bus clear sending function.
• Can generate receive buffer full, transmit buffer empty, and other interrupts.
Figure 14.1.1 shows the I2C configuration.
Item
Number of channels
I2C Ch.n
Interrupt controller
BYTEENDIE
GCIE
NACKIE
STOPIE
STARTIE
ERRIE
RBFIE
TBEIE
SFTRST
OADR10
OADR[9:0]
GCEN
MST
TXNACK
TXSTART
TXSTOP
CLKSRC[1:0]
CLKDIV[1:0]
Clock generator DBRUN
MODEN
CLK_I2Cn
S1C17W12/W13 TECHNICAL MANUAL
(Rev. 1.2)
C bus interface. The features of the I2C are listed below.
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Table 14.1.1 I2C Channel Configuration of S1C17W12/W13
S1C17W12
Receive data buffer
Transmit data buffer
Interrupt
BYTEENDIF
control circuit
NACKIF
STOPIF
STARTIF
ERRIF
RBFIF
TBEIF
Transmit/receive
BRT[6:0]
Figure 14.1.1 I2C Configuration
Seiko Epson Corporation
1 channel (Ch.0)
RXD[7:0]
TXD[7:0]
GCIF
control circuit
Slave mode
controller
Master mode
controller
Baud rate
generator
14 I
C bus signals only.
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S1C17W13
Shift register
Shift register
V
SS
SDALOW
SCLLOW
BSY
TR
SCLO
V
SS
2 C (I2C)
SDAn
SCLn
14-1