Texas Instruments TLC694 Series, Техническое справочное руководство

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1 2 14 15
SIN
SCLK
LAT
FC1
Bit 15
FC1
Bit 14
FC1
Bit 5
FC1
Bit 4
FC1
Bit 2
FC1
Bit 1
FC1
Bit 3
FC1
Bit 0
1 2 11 12 16 15 14 13
FC1 Old FC1 Data New FC1 Data
Other FCx
(x = 2, 3, 4)
FCx Data
Write FC1 Register:
WRTFC_EN
(15 SCLK rising edges)
WRTFC1
(5 SCLK rising edges)
Function-Control Commands
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16 SLVUBF4A – February 2018 – Revised June 2019
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Function Control
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2.2 Function-Control Commands
2.2.1 Write Function-Control Register
The TLC694x device uses the WRTFC_EN and WRTFCx command (x = 1, 2, 3, 4) to latch the common
shift register data into the function-control registers. These commands are distinguished by the number of
the SCLK rising edges included in the LAT pulse.
Table 2-9 describes more about these commands.
Table 2-9. Description of Commands to Write Function-Control Data
COMMAND NAME
NUMBER OF SCLK RISING
EDGES WHEN LAT IS
HIGH
DESCRIPTION
WRTFC_EN 15
Enable the write-function-control-data command. This WRTFC_EN command
must always be input before writing function-control data. Otherwise, the device
ignores the WRTFCx commands.
WRTFC1 5
Command to write function-control data to the FC1 register. The 16-bit
function-control data in the common shift register are copied to the FC1
register.
WRTFC2 7
Command to write function-control data to the FC2 register. The 16-bit
function-control data in the common shift register are copied to the FC2
register.
WRTFC3 9
Command to write function-control data to the FC3 register. The 16-bit
function-control data in the common shift register are copied to the FC3
register.
WRTFC4 11
Command to write function-control data to the FC4 register. The 16-bit
function-control data in the common shift register are copied to the FC4
register.
Note that the WRTFC_EN command must be received before WRTFCx commands. Otherwise, the
TLC694x device ignores the WRTFCx commands.
Figure 2-6 to Figure 2-9 show the detailed timing diagrams of the function-control-register write operations.
Figure 2-6. WRTFC_EN Command and WRTFC1 Command