MC68HC812A4 Datasheet, PDF (332/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

ECLK
IRQ, XIRQ,
OR INTERNAL
INTERRUPTS
ADDRESS
t_PCSU
t_WRS
SP – 2 SP – 4 SP – 6 . . . SP – 9 SP – 9 SP – 9. . . SP – 9 SP – 9
FREE
1ST
PIPE
2ND 3RD
PIPE PIPE
1ST
EXEC
PC, IY, IX, B:A, , CCR
STACK REGISTERS
VECTOR
ADDRESS
R/W
Note: RESET also causes recovery from WAIT.
Figure 18-4. WAIT Recovery Timing Diagram
ECLK
IRQ⁽¹⁾
IRQ⁽²⁾, XIRQ,
OR INTERNAL
INTERRUPT
ADDRESS
t_PCSU
PW_IRQ
DATA
R/W
Notes:
1. Edge sensitive IRQ pin (IRQE bit = 1)
2. Level sensitive IRQ pin (IRQE bit = 0)
VECTOR
ADDR
VECT
SP – 2
PC
1ST
PIPE
SP – 4 SP – 6
IY
IX
PROG
FETCH
2ND
PIPE
SP – 8 SP – 9
3RD
PIPE
1ST
EXEC
B:A
PROG
FETCH
CCR
PROG
FETCH
Figure 18-5. Interrupt Timing Diagram