Service Manual
14
8. Key Parts Pin Assignments
8.1 U401 (gm2621-LF) I/O Legend: P=Power, G=Ground, O=Output, I=Input, A=Analog
Pin Symbol I/O Description
1 AVSS_BIAS G Analog ground for LVDS PLL and Bandgap
2 VDD_OUT_33 P Digital 3.3V supply for LVDS output
3 RESERVED O Reserved; Do not connect
4 RESERVED O Reserved; Do not connect
5 RESERVED O Reserved; Do not connect
6 RESERVED O Reserved; Do not connect
7 E_CH3P_LV O LVDS signal of even channel 3(+)
8 E_CH3N_LV O LVDS signal of even channel 3(-)
9 E_CLKP_LV O LVDS signal of even channel clock (+)
10 E_CLKN_LV O LVDS signal of even channel clock (-)
11 E_CH2P_LV O LVDS signal of even channel 2(+)
12 E_CH2N_LV O LVDS signal of even channel 2(-)
13 E_CH1P_LV O LVDS signal of even channel 1(+)
14 E_CH1N_LV O LVDS signal of even channel 1(-)
15 E_CH0P_LV O LVDS signal of even channel 0(-)
16 E_CH0N_LV O LVDS signal of even channel 0(-)
17 CVDD_18 P Core VDD connect to digital 1.8V
18 CRVSS O Chip digital ground
19 RESERVED O Reserved; Do not connect
20 RESERVED O Reserved; Do not connect
21 RESERVED O Reserved; Do not connect
22 RESERVED O Reserved; Do not connect
23 RESERVED O Reserved; Do not connect
24 RESERVED O Reserved; Do not connect
25 Vdd_out_33 P Digital 3.3V supply for LVDS output
26 VSS_OUT G Digital ground for LVDS output
27 RESERVED O Reserved; Do not connect
28 RESERVED O Reserved; Do not connect
29 RESERVED O Reserved; Do not connect
30 RESERVED O Reserved; Do not connect
31 O_CH3P_LV O LVDS odd channel 3 positive. Reserved for gm5611 and gm2621
32 O_CH3N_LV O LVDS odd channel 3 negative. Reserved for gm5611 and
gm2621
33 O_CLKP_LV O LVDS odd channel clock positive. Reserved for gm5611 and
gm2621
34 O_CLKN_LV O LVDS odd channel clock negative. Reserved for gm5611 and
gm2621
35 O_CH2P_LV O LVDS odd channel 2 positive. Reserved for gm5611 and gm2621
36 O_CH2N_LV O LVDS odd channel 2 negative. Reserved for gm5611 and
gm2621
37 O_CH1P_LV O LVDS odd channel 1 positive. Reserved for gm5611 and gm2621
38 O_CH1N_LV O LVDS odd channel 1 negative. Reserved for gm5611 and
gm2621
39 O_CH0P_LV O LVDS odd channel 0 positive. Reserved for gm5611 and gm2621
40 O_CH0N_LV O LVDS odd channel 0 negative. Reserved for gm5611 and
gm2621
41 RESERVED O Reserved; Do not connect
42 RESERVED O Reserved; Do not connect
43 RESERVED O Reserved; Do not connect
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