DAC8574 Datasheet, PDF (24/40 Pages) Texas Instruments – QUAD, 16-BIT, LOW-POWER, VOLTAGE OUTPUT, I2C INTERFACE DIGITAL-TO-ANALOG CONVERTER

DAC8574
SLAS377A – JANUARY 2003 – REVISED JUNE 2003
www.ti.com
DAC8574 as a Slave Transmitter - Standard and Fast Mode
Figure 53 shows the standard and fast mode master transmitter addressing a DAC8574 Slave Transmitter with a
7-bit address.
(DAC8574)
(DAC8574)
(DAC8574) (MASTER) (MASTER)
S SLAVE ADDRESS R/W A Ctrl <7:1> PD0 A Sr Slave Address R/W A MS-Byte A LS-Byte A P
’0’ (write)
’0’ = (Normal Mode)
’1’ (read)
Data Transferred
(2 Bytes + Acknowledge)
(DAC8574) (MASTER) (MASTER) (MASTER)
PD0 A Sr Slave Address R/W A PDN-Byte A MS-Byte A LS-Byte A P
PDN-Byte:
’1’ = (Power Down Flag)
’1’ (read)
Data Transferred
(3 Bytes + Acknowledge)
MSB
LSB
PD1 PD2 1 1 1 1 1 1
PD1 = Power-Down Bit
PD2 = Power-Down Bit
Figure 53. Standard and Fast Mode: Slave Transmitter
DAC8574 as a Slave Transmitter - High-Speed Mode
Figure 54 shows an I²C-Master addressing DAC8574 in high-speed mode (with a 7-bit address), as a Slave
Transmitter.
F/S-Mode
S
HS-Master Code A
(DAC8574)
HS-Mode
(DAC8574)
(DAC8574) (MASTER) (MASTER)
Sr Slave Address R/W A Ctrl <7:1> PD0 A Sr Slave Address R/W A MS-Byte A LS-Byte A P
’0’ (write)
’0’ = (Normal Mode)
’1’ (read)
Data Transferred
(2 Bytes + Acknowledge)
(DAC8574) (MASTER) (MASTER) (MASTER)
PD0 A Sr Slave Address R/W A PDN-Byte A MS-Byte A LS-Byte A P
’1’ = (Power -Down Flag)
’1’ (read)
Data Transferred
(3 Bytes + Acknowledge)
Figure 54. High-Speed Mode: Slave Transmitter
24