Intel 8XC196Lx, 8XC196Jx, 8XC196Kx, 87C196CA user manual Ptssel, Bit, Interrupt PTS Vector

STANDARD AND PTS INTERRUPTS

PTSSEL	Address:	0004H
	Reset State:	0000H

The PTS select (PTSSEL) register selects either a PTS microcode routine or a standard interrupt service routine for each interrupt request. Setting a bit selects a PTS microcode routine; clearing a bit selects a standard interrupt service routine. In PTS modes that use the PTSCOUNT register, hardware clears the corresponding PTSSEL bit when PTSCOUNT reaches zero. The end-of-PTS interrupt service routine must reset the PTSSEL bit to re-enable the PTS channel.

	15									8
LA		—	EXTINT		—	RI	TI	SSIO1	SSIO0	—
		7								0
		—		—	AD	EPA0	EPA1	EPA2	EPA3	EPAx
		15								8
LB
		—	EXTINT		—	RI	TI	SSIO1	SSIO0	J1850ST
		7								0
		J1850RX	J1850TX		AD	EPA0	EPA1	EPA2	EPA3	EPAx
		15								8
LD
		—	EXTINT		—	RI	TI	SSIO1	SSIO0	—
		7								0
		—		—	—	EPA0	EPA1	EPA2	EPA3	EPAx
Bit						Function
Number
14:0†	Setting a bit causes the corresponding interrupt to be handled by a PTS microcode routine.
	The PTS interrupt vector locations are as follows:
		Bit Mnemonic		Interrupt				PTS Vector
		EXTINT		EXTINT pin				205CH
		Reserved†		—				205AH
		RI		SIO Receive				2058H
		TI		SIO Transmit				2056H
		SSIO1		SSIO 1 Transfer				2054H
		SSIO0		SSIO 0 Transfer				2052H
		J1850ST (LB)		J1850 Status				2050H
		J1850RX(LB)		J1850 Receive				204EH
		J1850TX(LB)		J1850 Transmit				204CH
		AD(LA, LB)		A/D Conversion Complete				204AH
		EPA0		EPA Capture/Compare Channel 0				2048H
		EPA1		EPA Capture/Compare Channel 1				2046H
		EPA2		EPA Capture/Compare Channel 2				2044H
		EPA3		EPA Capture/Compare Channel 3				2042H
		EPAx††		Multiplexed EPA				2040H
	†† PTS service is not useful for shared interrupts because the PTS cannot readily
		determine the source of these interrupts.

†Bit 13 is reserved on the 8XC196Lx devices and bits 6–8 are reserved on the 87C196LA and 83C196LD. For compatibility with future devices, write zeros to these bits.

Figure 4-5. PTS Select (PTSSEL) Register

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