Fujitsu 16LX manual X1 pins5HVHW. Exwwrq

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These-￿￿￿-￿￿￿jumpers allow to use Mainboard’s I2C connector/EEPROM memory even in the case, when CPU itself doesn’t provide the I2C interface. When both of these jumpers are SHORT, the CPU’s RQ signal is connected to the Mainboard’s SDA signal (via J19) and #HAK signal is connected to SCL signal. An user can then program the #HAK, HRQ signals to behave/RZVSHHGas I2C;7interface.$/MXPSHUV

When short, these jumpers connect the 32.768 kHz crystal to the Bus Interface connector X1A, X0A+LJKpins.

When short, these jumpers connect the 4MHz crystal to the Bus Interface connector X0,

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This button+DUGZDUHcan beVWDQGE\used forEXWWRQreseting the CPU.

While this button is pressed, the CPU stays in the standby mode (all oscillators are stopped, all I/O pins are set to high impedance state, special purpose registers such as the

accumulator6:￿￿&38',3VZLWFKHVare reset to their default values, but content of internal RAM is preserved)
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1: MD0
2: MD1	8 7 6 5 4	2 1
3: MD2
4: S-			ON
5: S-
6: -
7: AD00 (P00)
8: AD01 (P 1)

These switches should be used only when using the CPU board without Mainboard, or

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MD2	MD1	MD0	AD00/	AD01	Mode name	Reset vector area	External data
			P00	/P01			bus witdth
ON	ON	ON	OFF	OFF	External vector mode 0	External	8
ON	ON	OFF	OFF	OFF	External vector mode 1	External	16
ON	OFF	ON	OFF	OFF	External vector mode 2	External	16
ON	OFF	OFF	OFF	OFF	Internal vector mode	Internal	(Mode data)
OFF	ON	ON	X	X	Reserved
OFF	ON	OFF	X	X	Reserved
OFF	OFF	ON	ON	ON	Async serial programming
OFF	OFF	OFF	X	X	￿￿Reserved