EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 250

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
I
2
C Registers
received or
cleared to 0 to allow data transfer to continue.
If the AAK bit in the
SDA) is transmitted and the IFLG bit is set after each byte is received. The
register contains the two status codes
entered with the general call address. The received data byte can be read from
the
tinue. If a STOP condition or a repeated START condition is detected after the
acknowledge bit, the IFLG bit is set and the
A0h
If the AAK bit is cleared to 0 during a transfer, the I
level on SDA) after the next byte is received, and sets the IFLG bit to 1. The
I2C_SR
mode is entered with the general call address. The I
when the IFLG bit is cleared to 0.
Addressing
The CPU interface provides access to six 8-bit registers: four Read/Write regis-
ters, one Read Only register and two Write Only registers, as indicated in Table
123.
Table 123. I
Resetting the I
Hardware Reset.
device, the
00h
Register
I2C_SAR
I2C_XSAR
I2C_DR
I2C_CTL
I2C_SR
I2C_CCR
I2C_SRR
.
; while the
I2C_DR
register contains the two status codes
2
I2C_SAR
78h
register and the IFLG bit must be cleared to allow the transfer to con-
C Register Descriptions
I2C_SR
2
if the general call address is received. The IFLG bit must be
C Registers
When the I
Description
Slave address register
Extended slave address register
Data byte register
Control register
Status register (Read Only)
Clock Control register (Write Only)
Software reset register (Write Only)
I2C_CTL register
,
I2C_XSAR
register is set to
P R E L I M I N A R Y
2
C is reset by a hardware reset of the eZ80F91
,
I2C_DR,
is set to 1 then an ACK bit (Low level on
80h
F8h
and
or
.
I2C_SR
90h
I2C_CTL
88h
if SLAVE RECEIVE mode is
2
or
C transmits a NACK bit (High
2
register contains status code
C returns to an idle state
98h
registers are cleared to
if SLAVE RECEIVE
Product Specification
I
2
C Serial I/O Interface
eZ80F91 MCU
I2C_SR
231