Datasheet

© 2011-2012 Microchip Technology Inc. DS22272C-page 69
MCP4706/4716/4726
8.8 Serial Interface Communication
Times
Table 8-1 shows time/frequency of the supported
operations of the I
2
C serial interface for the different
serial interface operational frequencies. This, along
with the V
OUT
output performance (such as slew rate),
would be used to determine your application’s volatile
DAC register update rate.
TABLE 8-1: SERIAL INTERFACE TIMES / FREQUENCIES
Command
Writes Volatile
Memory?
Writes EEPROM
Memory?
# of
Serial
Inter-
face Bits
(2)
Command Time (uS)
Command Frequency
(kHz)
Code
Function C2 C1 C0
Config. DAC Config. DAC
100
kHz
400k
Hz
3.4
MHz
100
kHz
400
kHz
3.4
MHz
00XWrite
Volatile DAC
Yes
(1)
Yes No No 29 290 72.5 8.5 3.4 13.8 117.2
010Write
Volatile
Memory
Yes Yes No No 38 380 95 11.2 2.6 10.5 89.5
0 1 1 Write All
Memory
Yes Yes Yes Yes 38 380 95 11.2 2.6 10.5 89.5
100Write NV
Configura-
tion Bits
Yes No No No 20 200 50 5.9 5.0 20.0 170.0
N/A Read N/A N/A N/A N/A 77 750 187.5 22.1 1.3 5.3 45.3
Note 1: Only the volatile PD1:PD0 bits of the Configuration bits are written.
2: Includes the Start or Stop bits.