EVAL-ADUC836QS AD [Analog Devices], EVAL-ADUC836QS Datasheet - Page 46

• Manufacturer Part Number: EVAL-ADUC836QS
• Description: MicroConverter, Dual 16-Bit ADCs with Embedded 62 kB Flash MCU
• Manufacturer: AD [Analog Devices]

I
The ADuC836 supports a fully licensed* I
I
ware master. SDATA (Pin 27) is the data I/O pin and SCLOCK
(Pin 26) is the serial clock. These two pins are shared with the
MOSI and SCLOCK pins of the on-chip SPI interface. Therefore
I2CCON
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
I2CADD
Function
SFR Address
Power-On Default Value
Bit Addressable
I2CDAT
Function
SFR Address
Power-On Default Value
Bit Addressable
*Purchase of licensed I
ADuC836
2
Patent Rights to use these components in an I
2
C SERIAL INTERFACE
C interface is implemented as a full hardware slave and soft-
Name
MDO
MDE
MCO
MDI
I2CM
I2CRS
I2CTX
I2CI
2
C components of Analog Devices or one of its sublicensed associated companies conveys a license for the purchaser under the Philips I
Description
I
This data bit is used to implement a master I
be output on the SDATA pin if the data output en able (MDE) bit is set.
I
Set by user to enable the SDATA pin as an output (Tx).
Cleared by user to en able SDATA pin as an input (Rx).
I
This data bit is used to implement a master I
be out put on the SCLOCK pin.
I
This data bit is used to implement a master I
latched into this bit on SCLOCK if the data output enable (MDE) bit is 0.
I
Set by user to enable I
Cleared by user to enable I
I
Set by user to reset the I
Cleared by user code for normal I
I
Set by MicroConverter if the interface is transmitting.
Cleared by the Mi cro Con vert er if the interface is receiving.
I
Set by the MicroConverter after a byte has been transmitted or re ceived.
Cleared automatically when the user code reads the I2CDAT SFR (see I2CDAT below).
2
2
2
2
2
2
2
2
C Software Master Data Output Bit (Master Mode Only).
C Software Master Data Output Enable Bit (Master Mode Only).
C Software Master Clock Output Bit (Master Mode Only).
C Software Master Data Input Bit (Master Mode Only).
C Master/Slave Mode Bit.
C Reset Bit (Slave Mode Only).
C Direction Transfer Bit (Slave Mode Only).
C Interrupt Bit (Slave Mode Only).
I
Holds the I
at www.analog.com/microconverter describes the format of the I
9BH
55H
No
I
The I2CDAT SFR is written by the user to trans mit data over the I
data just received by the I
and the I2CI bit in the I2CCON SFR. User software should access I2CDAT only once per interrupt cycle.
9AH
00H
No
2
2
C Address Register
C Data Register
2
I
E8H
00H
Yes
C system provided that the system conforms to the I
2
2
C peripheral address for the part. It may be overwritten by the user code. Application Note uC001
C Control Register
2
C serial in ter face. The
Table XXII. I2CCON SFR Bit Designations
2
C software Master mode.
2
C interface.
2
2
C hardware Slave mode.
C interface. Accessing I2CDAT automatically clears any pending I
2
C operation.
–46–
2
2
2
the user can enable only one in ter face or the other at any given
time (see SPE in Table XXI). Application Note uC001 de scribes
the operation of this in ter face as im ple ment ed and is avail able from
the MicroConverter website at: www.analog.com/microconverter.
Three SFRs are used to control the I
described below.
C transmitter interface in soft ware. Data written to this bit will
C transmitter interface in soft ware. Data written to this bit will
C receiver in ter face in software. Data on the SDA TA pin is
2
C Standard Spec i fi ca tion as defi ned by Philips.
2
C standard 7-bit address in detail.
2
C interface or read by user code to read
2
C interface. These are
2
C interrupt
2
C
REV. 0