Datasheet

DS3514
or exceeds +150°C. In this state, the V
COM
buffer is
disabled (output goes high impedance) until the junc-
tion temperature falls below +150°C.
Slave Address Byte and Address Pin
The slave address byte consists of a 7-bit slave
address plus a R/W bit (see Figure 5). The DS3514’s
slave address is determined by the state of the A0 pin.
This pin allows up to two devices to reside on the same
I
2
C bus. Connecting A0 to GND results in a 0 in the
corresponding bit position in the slave address.
Conversely, connecting A0 to V
CC
results in a 1 in the
corresponding bit position. For example, the DS3514’s
slave address byte is C0h when A0 is grounded. I
2
C
communication is described in detail in the I
2
C Serial
Interface Description section.
ADDRESS
NAME
(HEX) (DEC)
DESCRIPTION
TYPE
MEMORY
OR COMMAND
I
2
C
ACCESS
Latch A for V
COM
Ch 0h 0 8-Bit I
2
C Data for V
COM
DAC Volatile R/W
Latch A for GM1 Ch 2h, 3h 2, 3 10-Bit I
2
C Data for GM1 DAC Volatile R/W
Latch A for GM2 Ch 4h, 5h 4, 5 10-Bit I
2
C Data for GM2 DAC Volatile R/W
Latch A for GM3 Ch 6h, 7h 6, 7 10-Bit I
2
C Data for GM3 DAC Volatile R/W
Latch A for GM4 Ch 8h, 9h 8, 9 10-Bit I
2
C Data for GM4 DAC Volatile R/W
Latch A for GM5 Ch Ah, Bh 10, 11 10-Bit I
2
C Data for GM5 DAC Volatile R/W
Latch A for GM6 Ch Ch, Dh 12, 13 10-Bit I
2
C Data for GM6 DAC Volatile R/W
Latch A for GM7 Ch Eh, Fh 14, 15 10-Bit I
2
C Data for GM7 DAC Volatile R/W
Latch A for GM8 Ch 10h, 11h 16, 17 10-Bit I
2
C Data for GM8 DAC Volatile R/W
Latch A for GM9 Ch 12h, 13h 18, 19 10-Bit I
2
C Data for GM9 DAC Volatile R/W
Latch A for GM10 Ch 14h, 15h 20, 21 10-Bit I
2
C Data for GM10 DAC Volatile R/W
Latch A for GM11 Ch 16h, 17h 22, 23 10-Bit I
2
C Data for GM11 DAC Volatile R/W
Latch A for GM12 Ch 18h, 19h 24, 25 10-Bit I
2
C Data for GM12 DAC Volatile R/W
Memory Map
1
1
0
0
R/W
A0
0
0
MSB
LSB
SLAVE ADDRESS*
*THE SLAVE ADDRESS IS DETERMINED BY ADDRESS PIN A0.
Figure 5. DS3514 Slave Address Byte
Memory Organization
Memory Description
The list of registers/memory contained in the DS3514 is
shown in the Memory Map section. Also shown for
each of the registers is the memory type, accessibility,
as well as the power-up default values for volatile loca-
tions and factory-programmed defaults for the non-
volatile locations. Additional information regarding
reading and writing the memory is located in the
I
2
C
Serial Interface Description section.
I
2
C Gamma and V
COM
Buffer with EEPROM
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