PCIe

PCIe x4 connector above the Communication Processor (PCI) connector on a TMU-520

PCIe

Bus, resembling Conventional PCIe x4 1.0, partly connected to South Bridge, with 200 exposed pads.
Can be activated by setting the Repository Node sys.lv1.iosys.pciex to 1 (in sysctl.txt). The PCIe MMIO address space can be extended to 1GB by setting sys.lv1.large_pciex to 1.
The Hypervisor does not allow all PCIe device to be used with this connector, the check can e.g. be found in sub_2355B4 (lv1.self, 4.81 DECR).

200-pin layout

CN4351 200P on DECR-1000 TMU-520

Pin	Usage	Standardized Pinout	Remark
1	GND
2	GND
3	?	REFCLK+ ?	to clock chip
4	GND
5	?	REFCLK- ?	to clock chip
6	GND
7	GND
8	GND
9	GND
10	GND
11	GND
12	GND
13	GND
14	GND
15	PEXPERPA[0]	HSIp(0)
16	GND
17	PEXPERNA[0]	HSIn(0)
18	GND
19	GND
20	GND
21	GND
22	GND
23	GND
24	GND
25	GND
26	GND
27	PEXPERPA[1]	HSIp(1)
28	GND
29	PEXPERNA[1]	HSIn(1)
30	GND
31	GND
32	GND
33	GND
34	GND
35	GND
36	GND
37	GND
38	GND
39	PEXPERPA[2]	HSIp(2)
40	GND
41	PEXPERNA[2]	HSIn(2)
42	GND
43	GND
44	GND
45	GND
46	GND
47	GND
48	GND
49	GND
50	GND
51	PEXPERPA[3]	HSIp(3)
52	GND
53	PEXPERNA[3]	HSIn(3)
54	GND
55	GND
56	GND
57	GND
58	GND
59	GND
60	GND
61	GND
62	GND
63	PEXPETPA[0]	HSOp(0)
64	GND
65	PEXPETNA[0]	HSOn(0)
66	GND
67	GND
68	GND
69	GND
70	GND
71	GND
72	GND
73	GND
74	GND
75	PEXPETPA[1]	HSOp(1)
76	GND
77	PEXPETNA[1]	HSOn(1)
78	GND
79	GND
80	GND
81	GND
82	GND
83	GND
84	GND
85	GND
86	GND
87	PEXPETPA[2]	HSOp(2)
88	GND
89	PEXPETNA[2]	HSOn(2)
90	GND
91	GND
92	GND
93	GND
94	GND
95	GND
96	GND
97	GND
98	GND
99	PEXPETPA[3]	HSOp(3)
100	GND
101	PEXPETPA[3]	HSOn(3)
102	GND
103	GND
104	GND
105	GND
106	GND
107	GND
108	GND
109	GND
110	GND
111	GND
112	GND
113	GND
114	GND
115	?	SMDAT ?	to smbus chip
116	GND
117	GND
118	GND
119	GND
120	GND
121	GND
122	GND
123	GND
124	GND
125	NC
126	NC
127	+3.3V?
128	+3.3V?
129	NC
130	NC
131	GND
132	GND
133	GND
134	GND
135	GND
136	GND
137	NC
138	NC
139	+3.3V?
140	+3.3V?
141	+3.3V?
142	+3.3V?
143	+3.3V?
144	+3.3V?
145	+3.3V?
146	+3.3V?
147	+3.3V?
148	+3.3V?
149	+3.3V?
150	+3.3V?
151	+3.3V?
152	+3.3V?
153	+3.3V?
154	+3.3V?
155	+3.3V?
156	+3.3V?
157	+3.3V?
158	+3.3V?
159	NC
160	NC
161	+3.3V?
162	+3.3V?
163	+3.3V?
164	+3.3V?
165	+3.3V?
166	+3.3V?
167	NC
168	NC
169	+12V?
170	+12V?
171	+12V?
172	+12V?
173	+12V?
174	+12V?
175	+12V?
176	+12V?
177	+12V?
178	+12V?
179	+12V?
180	+12V?
181	+12V?
182	+12V?
183	+12V?
184	+12V?
185	+12V?
186	+12V?
187	+12V?
188	+12V?
189	+12V?
190	+12V?
191	+12V?
192	+12V?
193	+12V?
194	+12V?
195	NC
196	NC
197	GND
198	GND
199	GND
200	GND