MC68HC908LD60IFU Freescale Semiconductor, MC68HC908LD60IFU Datasheet - Page 277
MC68HC908LD60IFU
Manufacturer Part Number
MC68HC908LD60IFU
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC908LD60IFU.pdf
(292 pages)
Specifications of MC68HC908LD60IFU
Cpu Family
HC08
Device Core Size
8b
Frequency (max)
6MHz
Program Memory Type
Flash
Program Memory Size
60KB
Total Internal Ram Size
1KB
# I/os (max)
39
Number Of Timers - General Purpose
2
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
On-chip Adc
6-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
0C to 85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
64
Package Type
PQFP
Lead Free Status / Rohs Status
Compliant
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Quantity
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MC68HC908LD60
Freescale Semiconductor
;
;
;
;
This code works if the H register has been pushed onto the stack in the break
service routine software. This code should be executed at the end of the break
service routine software.
HIBYTE
LOBYTE
DOLO
RETURN
EQU
EQU
If not SBSW, do RTI
BRCLR
TST
BNE
DEC
DEC
PULH
RTI
—
Rev. 1.1
5
6
SBSW,SBSR, RETURN
LOBYTE,SP
DOLO
HIBYTE,SP
LOBYTE,SP
Note: Writing a logic 0 clears SBSW.
Address:
SBSW — SIM Break Stop/Wait Bit
SBSW can be read within the break interrupt routine. The user can
modify the return address on the stack by subtracting one from it. The
following code is an example.
Reset:
Read:
Write:
This status bit is useful in applications requiring a return to wait or stop
mode after exiting from a break interrupt. Clear SBSW by writing a
logic 0 to it. Reset clears SBSW.
1 = Stop mode or wait mode was exited by break interrupt
0 = Stop mode or wait mode was not exited by break interrupt
$FE00
Bit 7
R
Figure 21-6. SIM Break Status Register (SBSR)
Break Module (BRK)
R
6
;
;
;If RETURNLO is not zero,
;then just decrement low byte.
;Else deal with high byte, too.
;Point to WAIT/STOP opcode.
;Restore H register.
See if wait mode or stop mode was exited by
break.
R
R
5
= Reserved
R
4
R
3
R
2
Break Module Registers
Break Module (BRK)
SBSW
Note
1
0
Technical Data
Bit 0
R
277
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