Epson S1C62 Family, Reference Manual

Page: 126 / 219

ICE CONTROL SOFTWARE ICS62XX
VIII-12
EPSON
S1C62 FAMILY
DEVELOPMENT TOOL REFERENCE MANUAL
2.3.3
SYNC pin and HALT pin output
(1) SYNC Pin Output
When the instruction cycle
conforms to a break condition,
a low level pulse is output by
the first half of the subsequent
instruction fetch cycle.
Correspond to
break condition
Evaluation board
clock
Fetch signal
Instruction cycle
SYNC output
5 clock instruction
About 1
µ
sec (clock 455 kHz)
About 15.6
µ
sec (clock 32 kHz)
Fig. 2.3.3.1 SYNC pin output
(2) HALT Pin Output
A low level pulse is output
when the evaluation board
CPU is stopped (e.g., when
the HALT or SLP instructions
are executed).
Fig. 2.3.3.2 HALT pin output Indicate the CPU halt
HALT output
2.3.4
Display during run mode and during break
During run mode, the ICE control processor monitors the state of the evaluation board CPU. Monitored
data evaluation board CPU's executed program are displayed at intervals of about 500 msec when the on-
the-fly display mode is set (by the OTF command).
#G
*PC=0120 . . . Underlined portion is displayed in succession.
*PC=HALT . . . Enter HALT mode, line feed, and HALT is displayed.
*PC=0200 . . . HALT is canceled, operation is restarted, and PC is redisplayed.
Note HALT indicates execution of the HALT or SLP instruction.
When the printer is online and started, the PC values are printed in succession. PC is not displayed
during on-the-fly inhibit mode.
During a break, the cause of the break, post break PC (the next executed program address), the
contents of the CPU registers, and execution time are displayed.
#G
*PC=xxxx
*EMULATION END STATUS=BREAK HIT
. . . (1)
*PC=0201 A=0 B=0 X=070 Y=071 F=IDZC SP=10
. . . (2)
*RUN TIME=425.097mS
. . . (3)
(1) There are three statuses possible after completing the emulation: BREAK HIT, ESC KEY, OR BREAK
SW. When a number of conditions prevail, only the highest priority position is displayed in the follow-
ing priority ranking: BREAK SW > ESC KEY > BREAK HIT. A break may also be initiated by the reset
switch; a reset switch break causes "
*ICE6200 RESET SW TARGET*
" to be displayed and
instructions are awaited. The register display and execution time display are not active in this mode.
(2) The displayed PC shows the next executed value. Register values following "A" indicate the values
during a break. In the above example, the values (indicated 2) results from completing to execute the
instruction of address 0200.