Seiko Instruments DPU-30 manual 27

3. Input / Output signal specifications

Table 4-3 I/O Signal Specifications

Item	Condition		Rate Value			Unit
		Min		Typ.	Max
High input voltage	!RESET	1.76		−	5.5	V
Low input voltage	!RESET	0		−	1.44	V
High input voltage	DATA0 to 7, !STROBE,	3.15		−	5.5	V
	!FEED_IN, NEAR_C
Low input voltage	DATA0 to 7, !STROBE,	0		−	1.35	V
	!FEED_IN, NEAR_C
High input voltage	RXD, CTS	+2.8		−	+15	V
Low input voltage	RXD, CTS	−15		−	−2.8	V
High output voltage	BUSY, !ACK, !ERROR,	4.75		−	5.1	V
	SEL OUT, PE, NEAR_OUT
Low output voltage	BUSY, !ACK, !ERROR,	0		−	0.5	V
	SEL OUT, PE, NEAR_OUT
High output voltage	TXD, RTS	+5		+9	+15	V
	( RL = 3 KΩ)
Low output voltage	TXD, RTS	−15		−9	−5	V
	( RL = 3 KΩ)

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