SPRUIM6A EVM User's guide

SPRUIM6A October 2018 – November 2020

3.3.12 GPMC/DSS Interface

The GPMC/DSS interface from the AM65x processor is routed to the GPMC/DSS expansion connector. This connector can be used to install an HDMI or DP adapter daughter card. The connector can also be used to attach to a circuit using the GPMC address/data bus interface. The function of the pins is defined by the pinmux definition.

The following interfaces are available on the GPMC/DSS connector:

Multiplexed GPMC and DSS signals. The signals are at 3.3-V I/O level.
McASP1 interface signals to support HDMI audio. The MCASP1 signals are multiplexed with PRG0_RGMII1 signals. Resistor options are provided to select the required interface. The McASP1 signals are at 1.8-V I/O level.
MCU_I2C0 for configuration and control. The signals are at 3.3-V I/O level.
WKUP I2C to connect to card ID memory. The signals are at 3.3-V I/O level.
SPI1 interface for configuration and control. The signals are at 3.3-V I/O level.

The McAPS1 signals are multiplexed with the PRG0_RGMII signals of the application card. Resistor options are provided on the processor card to select the required interface, as shown in Figure 3-21. Refer to Table 3-32 for details.

The board supports an option to mount a 60-pin connector (QSH-030-01-L-D-A-K) or a 120-pin connector (QSH-060-01-L-D-A-K). These connector footprints are overlapped such that only one of them can be mounted. By default, the 60-pin connector is mounted.

GPMC/DSS, I2C, and USB 2.0 signals are connected to 60-pin connector (J36). The McASP1 signals are connected to the second half of the 120-pin connector. Thus, to access the McASP1 signals, the 60-pin should be unmounted and 120-pin connector should be mounted.

Table 3-32 HDMI/GPMC Connector (J35) Pin-out

Pin No.	Signal	Direction
1	VOUT1_DATA23_	Output
2	VCC1V8	Power
3	VOUT1_DATA22	Bidirectional
4	VCC1V8	Power
5	VOUT1_DATA21	Power
6	NC	NA
7	VOUT1_DATA20	Bidirectional
8	CARDID_HDMI_A0	Output
9	VOUT1_DATA19	Bidirectional
10	CARDID_HDMI_A1	Output
11	VOUT_D18_BOOTMODE18	Bidirectional
12	CARDID_HDMI_A0	Power
13	VOUT_D17_BOOTMODE17	Bidirectional
14	NC	NA
15	VOUT_D16_BOOTMODE16	Bidirectional
16	PORZ_OUT	Output
17	DGND	Power
18	HDMI_GPMC_BRD_DET	Input
19	VOUT_D15_BOOTMODE15	Bidirectional
20	VOUT1_PCLK	Output
21	VOUT_D14_BOOTMODE14	Bidirectional
22	DGND	Power
23	VOUT_D13_BOOTMODE13	Bidirectional
24	VOUT1_VSYNC	Output
25	VOUT_D12_BOOTMODE12	Bidirectional
26	VOUT1_HSYNC_TEST_HDR	Output
27	VOUT_D11_BOOTMODE11	Bidirectional
28	VOUT1_DE_TEST_HDR	Output
29	VOUT_D10_BOOTMODE10	Bidirectional
30	DGND	Power
31	VOUT_D9_BOOTMODE9	Bidirectional
32	SOC_MCU_SCL	Output
33	VOUT_D8_BOOTMODE8	Bidirectional
34	SOC_MCU_SDA	Bidirectional
35	DGND	Power
36	DGND	Power
37	VOUT_D7_BOOTMODE7	Bidirectional
38	GP1_TOUCH_EVT	Output
39	VOUT_D6_BOOTMODE6	Bidirectional
40	CON_LCD_PWR_DN	Output
41	VOUT_D5_BOOTMODE5	Power
42	SOC_SPI1_CS1	Output
43	VOUT_D4_BOOTMODE4	Bidirectional
44	SOC_SPI1_MOSI	Output
45	VOUT_D3_BOOTMODE3	Bidirectional
46	SOC_SPI1_MISO	Input
47	VOUT_D2_BOOTMODE2	Bidirectional
48	SOC_SPI1_CLK	Output
49	VOUT_D1_BOOTMODE1	Bidirectional
50	USB1_HDMI_GPMC_DRVBUS	Output
51	VOUT_D0_BOOTMODE0	Bidirectional
52	USB1_HDMI_GPMC_DM	Bidirectional
53	NC	NA
54	USB1_HDMI_GPMC_DP	Bidirectional
55	VCC_5V0	Power
56	VCC3V3_IO	Power
57	VCC_5V0	Power
58	VCC3V3_IO	Power
59	VCC_5V0	Power
60	VCC3V3_IO	Power
61	NC	NA
62	NC	NA
63	NC	NA
64	NC	NA
65	NC	NA
66	NC	NA
67	NC	NA
68	NC	NA
69	NC	NA
70	NC	NA
71	NC	NA
72	NC	NA
73	NC	NA
74	NC	NA
75	NC	NA
76	NC	NA
77	NC	NA
78	NC	NA
79	NC	NA
80	NC	NA
81	NC	NA
82	NC	NA
83	NC	NA
84	NC	NA
85	NC	NA
86	NC	NA
87	NC	NA
88	NC	NA
89	NC	NA
90	NC	NA
91	NC	NA
92	NC	NA
93	NC	NA
94	NC	NA
95	NC	NA
96	NC	NA
97	NC	NA
98	NC	NA
99	NC	NA
100	NC	NA
101	NC	NA
102	NC	NA
103	NC	NA
104	NC	NA
105	MCASP1_AFSX_3V3	IO
106	NC	NA
107	MCASP1_AXR1_3V3	IO
108	NC	NA
109	MCASP1_ACLKX_3V3	IO
110	NC	NA
111	MCASP1_AHCLKX_3V3	IO
112	NC	NA
113	MCASP1_AXR0_3V3	IO
114	NC	NA
115	MCASP1_ACLKR_3V3	IO
116	NC	NA
117	MCASP1_AFSR_3V3	IO
118	NC	NA
119	MCASP1_AHCLKR_3V3	IO
120	NC	NA