RTLPlayground/doc/devices/2M-PCB23-V3_1.md

2M-PCB23-V3.1

Brands

Brand	Type	Managed	PCB	Flash	Chip RTL
keepLINK	KP-9000-9XHML-X	Yes	2M-PCB23-V3.1	2M	8273N + 8224N

Connectors

J4 SFP PINs	Signal	Component	GPIO	Notes
2	TX_FAULT		---
3	TX_DISABLE		---	Pull down - 0R
4	MODDEF2 – SDA	b-r273	GPIO39
5	MODDEF1 – SCL	b-r274	GPIO40
6	MODDEF0 – PRESENT	B-R275	GPIO38
7	RATE SEL		---
8	LOS	B-R276	GPIO38
9	TO?		---

Note: component numbering <L>-<REFDES>-<SIDE>

• L: Layer, T=Top, B=Bottom
• REFDEES: full silkscreen like R123
• SIDE: Side of the component. when the rj45 are facing towards you are you can read the silkscreen normal. L = Left, R=right, B=bottom, T=top or P with a pin number.

T8, serial console

T9 pin	GPIO	Signal
1	GPIO31	U0TXD (Output)
2	GND	PWR
3	GPIO32	U0RXD (Input)
4	3V3	PWR

T7

T7 pin	what	Signal
1	GPIO
2	GND
3	GPIO
4	3V3
5	GPIO
6	GPIO

T9

T9 SMI	Signal	Component	GPIO	Notes
1	MDO	SMI-MDO	GPIO41
2	GND	PWR
3	MDC	SMI-MDC	GPio40

T10

T10 pin	what	Signal
1	GPIO49
2	GPIO47
3	3V3
4	GPIO48
5	GND
6	GPIO46

Reset ciruit

Reset-line found at T-D6-L, T-R83, T-R97, T-R94, T-R93 active-low.

GPIO

HEX VAL.	GPIO	Component	What		GPIO	Component	What
00000001	GPIO00	T-R34-R, P1-LED-YL	?		GPIO32	B-r126-r	U0RXD
00000002	GPIO01	T-R99-R, P1-LED-GR	?		GPIO33
00000004	GPIO02		?		GPIO34	B-R172, To RTL8225	Already driver HIGH INT?
00000008	GPIO03	T-R113-R, P2-LED-GR	?		GPIO35	B-R173, To RTL8225	Easy to pulldown Reset?
00000010	GPIO04	T-R115-R, P3-LED-YL	?		GPIO36
00000020	GPIO05	T-R117-R, P3-LED-GR	?		GPIO37	To RTL8225	Already driver low I2C-SCL?
00000040	GPIO06		?		GPIO38	sfp-6 via B-R275, sfp-8 via B-R276
00000080	GPIO07		?		GPIO39	sfp-4, b-r273, B-r143
00000100	GPIO08				GPIO40	T9-2, sfp-5 b-r274, B-r146	SMI-MDC
00000200	GPIO09		LEDx1		GPIO41	T9-1,	SMI-MDO , B-r143
00000400	GPIO10				GPIO42	U6?8?-P6, T-R	SPI-MEMORY, CLK
00000800	GPIO11		LEDx1		GPIO43	U6?8?-P5, T-R	SPI-MEMORY, DI,IO0
00001000	GPIO12		LEDx1		GPIO44	U6?8?-P2, T-R	SPI-MEMORY, DO,IO1
00002000	GPIO13		LEDx1		GPIO45	U6?8?-P1, T-R	SPI-MEMORY, CS
00004000	GPIO14		LEDx1		GPIO46	T10-6
00008000	GPIO15		LEDx1		GPIO47	T10-2
00010000	GPIO16		LEDx1		GPIO48	T10-4, J6 (BUTTON RESET)
00020000	GPIO17		LEDx1		GPIO49	T10-1
00040000	GPIO18		LEDx1		GPIO50
00080000	GPIO19		LEDx1		GPIO51
00100000	GPIO20		LEDx1		GPIO52
00200000	GPIO21	P7-LED-GR, B-R139	LEDx1		GPIO53
00400000	GPIO22		LEDx1		GPIO54
00800000	GPIO23		LEDx1		GPIO55
01000000	GPIO24	P8-led-yellow,b-r154	LEDx		GPIO56
02000000	GPIO25				GPIO57
04000000	GPIO26		LEDx		GPIO58
08000000	GPIO27		?		GPIO59
10000000	GPIO28				GPIO60
20000000	GPIO29				GPIO61
40000000	GPIO30		SFP-DETE		GPIO62	To RTL8225	Already driver INT?
80000000	GPIO31	B-r129-r?	U0TXD		GPIO63

GPIO Register Input value

GPIO 1: 0a7ffbdd GPIO 0: effb6dff

LEDs

NAME	COMPONENTS	GPIO
SYSTEM		?
SFP		?

Power supply

Board has two supply rails. 0.95 and 3.3 volt.

0.95 Core Voltage.

Voltage is crated by a MP2225GJ Buck converter. 0.95V must be within 3%.

3.3 Voltage

Voltage is crated by a MP2225GJ Buck converter. 3.3V must be within 4.5%. Chip can deliver up to 5A and the sweetspot is at 2A. So higher power SFP-modules should work.

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1. LEDs are found by just plugin a RJ45 connector and see with cmd gpio the status change. But the bit pattern for port 1,2 are diffrent from port 3,4. ↩︎