Atmel AT91SAM9XE-EK 사용자 설명서

6311A–ATARM–04-Feb-08

Table 4-2.  JTAG/ICE Configuration

S1

Opened

Disables the ICE NTRST input

S2

Opened

Selects ICE mode or JTAG mode

S3

Opened

Disables TCK <-> RTCK local loop. If S3 is closed, R13 must be 

unsoldered.

R13

Soldered

Enables the ICE RTCK return. S3 must be opened

R14

Soldered

Enables the ICE NRST input

Table 4-3.  Microcontroller Clock Configuration

R18/R20

Soldered

Enables the use of 18.432MHz crystal. If an external clock is used, 

R18/R20 must be unsoldered and S4 closed.

S4

Opened

J9

Slow Clock Setting. See 

.

Table 4-4.  Memory Configuration

R31

R32

Soldered

Soldered

Enables MN7 Chip select access

Enables MN8 Chip select access

R34

S6

Soldered

Opened

Enables the use of Ready Busy signal

Disables write protection.

S5

Opened

Disables the write protection.

R46

R47

Soldered

Soldered

Enables SCL access

Enables SDA access