Documentation links
Keil MCB1800 board

Jumper configuration
The list below shows the default jumper configuration used for all Keil 1857 evaluation examples. Use this configuration for the examples unless an example alters this default setting in it's description.
Keil 1857 and 4357 boards use the same default jumper setting.

J2 : ALL OPEN
J3 : 3V3
J5 : CLOSED
J9 : ALL OPEN
J10 : OPEN
J14 : DAC
J13 : UART3
J16 : UART3
J17 : OPEN
J18 : OPEN
J19 : CLOSED
J20 : CLOSED
J21 : CLOSED
P2_9 : L
P2_8 : L
P1_2 : L
P1_1 : H
3V3A : CLOSED
3V3R : CLOSED
3V3IO : CLOSED

Board recovery using the ISP pin
If the board's FLASH can no longer be programmed, the image in FLASH may be corrupt. To recover the board, hold down the ISP pin when resetting the board or during the program sequence. The button can be released once the board programming cycyle has started.