DS90UB924-Q1 Datasheet, PDF (23/62 Pages) Texas Instruments – 5-MHz to 96-MHz 24-bit Color FPD-Link III to OpenLDI Deserializer With Bidirectional Control Channel

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DS90UB924-Q1
SNLS512 – APRIL 2016
DESCRIPTION
GPIO3
GPIO2
GPIO1
GPIO0
Table 2. DS90UB927Q-Q1 GPIO Enable and Configuration
DEVICE
DS90UB927Q-Q1
DS90UB924-Q1
DS90UB927Q-Q1
DS90UB924-Q1
DS90UB927Q-Q1
DS90UB924-Q1
DS90UB927Q-Q1
DS90UB924-Q1
FORWARD CHANNEL
0x0F = 0x03
0x1F = 0x05
0x0E = 0x30
0x1E = 0x50
0x0E = 0x03
0x1E = 0x05
0x0D = 0x03
0x1D = 0x05
BACK CHANNEL
0x0F = 0x05
0x1F = 0x03
0x0E = 0x50
0x1E = 0x30
0x0E = 0x05
0x1E = 0x03
0x0D = 0x05
0x1D = 0x03
Note: GPO_REG4 of the DS90UB921-Q1 or DS90UB925-Q1 can be used as a forward channel GPIO,
outputting on GPIO0 of DS90UB924-Q1. This can be set as follows:
• Set DS90UB921-Q1 or DS90UB925-Q1 in 18-bit mode by mode pin = 1 or by register 0x12[2] = 1.
• Set DS90UB924-Q1 register 0x1D[0] = 1 and 0x1D[2] = 1; this will enable GPIO0 of DS90UB924-Q1 as
output.
• Set DS90UB921-Q1 or DS90UB925-Q1 register 0x0F[4] = 1 and 0x0F[5] = 1; this will enable GPO_REG4 of
DS90UB921-Q1 or DS90UB925-Q1 as input.
Similarly GPO_REG5 of DS90UB921-Q1 or DS90UB925-Q1 can output to GPIO1 of DS90UB924-Q1:
• Set DS90UB921-Q1 or DS90UB925-Q1 in 18-bit mode by mode pin = 1 or by register 0x12[2] = 1.
• Set DS90UB924-Q1 register 0x1E[0] = 1 and 0x1E[2] = 1; this will enable GPIO1 of DS90UB924-Q1 as
output.
• Set DS90UB921-Q1 or DS90UB925-Q1 register 0x10[0] = 1 and 0x10[1] = 1; this will enable GPO_REG5
DS90UB921-Q1 or DS90UB925-Q1 as input.
The input value present on GPIO[3:0] may also be read from register or configured to local output mode
(Table 8).
7.3.14.2 GPIO[8:5]
GPIO_REG[8:5] are register-only GPIOs and may be programmed as outputs or read as inputs through local
register bits only. Where applicable, these bits are shared with I2S pins and override I2S input if enabled into
GPIO_REG mode. See Table 3 for GPIO enable and configuration.
Note: Local GPIO value may be configured and read either through local register access, or remote register
access through the Low-Speed Bidirectional Control Channel. Configuration and state of these pins are not
transported from serializer to deserializer as is the case for GPIO[3:0].
DESCRIPTION
GPIO_REG8
GPIO_REG7
GPIO_REG6
GPIO_REG5
Table 3. GPIO_REG and GPIO Local Enable and Configuration
REGISTER CONFIGURATION
0x21 = 0x01
0x21 = 0x09
0x21 = 0x03
0x21 = 0x01
0x21 = 0x09
0x21 = 0x03
0x20 = 0x01
0x20 = 0x09
0x20 = 0x03
0x20 = 0x01
0x20 = 0x09
0x20 = 0x03
FUNCTION
Output, L
Output, H
Input, Read: 0x6F[0]
Output, L
Output, H
Input, Read: 0x6E[7]
Output, L
Output, H
Input, Read: 0x6E[6]
Output, L
Output, H
Input, Read: 0x6E[5]
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB924-Q1
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