Datasheet
DS90UH926Q
SNLS337J –OCTOBER 2010–REVISED APRIL 2013
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GPO_REG[8:4] Enable Sequence
GPO_REG[8:4] are the outputs only pins. They must be programmed through the local register bits. See Table 7
for the GPO_REG enable sequencing.
Step 1: Enable the 18-bit mode either through the configuration register bit Table 9 on DS90UH925Q only.
DS90UH926Q is automatically configured as in the 18-bit mode.
Step 2: To enable GPO_REG8 outputs an “1” , write 0x90 to address 0x21 on DS90UH926Q..
Table 7. GPO_REG Enable Sequencing Table
# Description Device Local Access Local Output Value
1 Enable 18-bit mode DS90UH926Q 0x12 = 0x04
(on DS90UH925Q)
2 GPO_REG8 DS90UH926Q 0x21 = 0x90 “1”
0x21 = 0x10 “0”
3 GPO_REG7 DS90UH926Q 0x21 = 0x09 “1”
0x21 = 0x01 “0”
4 GPO_REG6 DS90UH926Q 0x20 = 0x90 “1”
0x20 = 0x10 “0”
5 GPO_REG5 DS90UH926Q 0x20 = 0x09 “1”
0x20 = 0x01 “0”
6 GPO_REG4 DS90UH926Q 0x1F = 0x90 “1”
0x1F = 0x10 “0”
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