Atmel AT91EB42 manual CB15 Serial DataFlash Enabling, CB17 SPI Eeprom Enabling, CB20

				Appendix A – Configuration Straps
CB15	Serial DataFlash Enabling
Closed(1)	AT91 NPCSA0 select signal is connected to the serial DataFlash memory.
Open	AT91 NPCSA0 select signal is not connected to the serial DataFlash
	memory. This authorizes users to connect the corresponding PIO to their
	own resources via the I/O expansion connector.
CB17	SPI EEPROM Enabling
Closed(1)	EEPROM communication enabled
Open	EEPROM communication disabled. This authorizes users to connect the
	corresponding PIO to their own resources via the I/O expansion connector.
CB18	PB20 ADC Write Access Signal
Closed(1)	AT91 PB20 signal is used to control the RD/WR ADC (U20) input pin. Prior to
	a write access, position this PIO line in a low state. Position it in a high state
	prior to a read access.
Open	AT91 PB20 signal is not used to control the RD/WR ADC (U20) input pin.
	This authorizes users to connect the corresponding signal to their own
	resources via the I/O expansion connector.
CB19	PB18 End of Fast Charge Signal
Closed(1)	AT91 PB18 signal is connected to the battery charger (U16), NFASTCHG
	output pin.
Open	AT91 PB18 signal is not connected to the battery charger (U16), NFASTCHG
	output pin. This authorizes users to connect the corresponding signal to their
	own resources via the I/O expansion connector.
CB20	JTAGSEL
1-2(1)	AT91 standard ICE debug feature enabled
2-3	IEEE 1149.1 JTAG boundary scan feature enabled
CB21, CB22, CB23		Charger Device (U16): Programming the Battery Number of Cells
Number of Cells			CB21	CB22	CB23
1			Open	Closed	Closed
2			Open	Open	Closed
4			Closed	Open	Closed
5(1)			Open	Closed	Open
6			Open	Open	Open
8			Closed	Open	Open

AT91EB42 Evaluation Board User Guide

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