P12C508 Microchip Technology, P12C508 Datasheet - Page 80

• Manufacturer Part Number: P12C508
• Description: 8-Pin / 8-Bit CMOS Microcontroller
• Manufacturer: Microchip Technology

PIC12C5XX
LIST OF EXAMPLES
Example 3-1: Instruction Pipeline Flow ............................ 10
Example 4-1: Indirect Addressing .................................... 17
Example 4-2: How To Clear RAM Using Indirect
Example 5-1: Read-Modify-Write Instructions on an
Example 6-1: Changing Prescaler (Timer0 WDT .........) 24
Example 6-2: Changing Prescaler (WDT Timer0 .........) 24
LIST OF FIGURES
Figure 3-1:
Figure 3-2:
Figure 4-1:
Figure 4-2:
Figure 4-3:
Figure 4-4:
Figure 4-5:
Figure 4-6:
Figure 4-7:
Figure 5-1:
Figure 5-2:
Figure 6-1:
Figure 6-2:
Figure 6-3:
Figure 6-4:
Figure 6-5:
Figure 7-1:
Figure 7-2:
Figure 7-3:
Figure 7-4:
Figure 7-5:
Figure 7-6:
Figure 7-7:
Figure 7-8:
Figure 7-9:
Figure 7-10:
Figure 7-11:
Figure 7-12:
Figure 7-13:
Figure 7-14:
Figure 7-15:
Figure 8-1:
Figure 10-1:
Figure 10-2:
Figure 10-3:
Figure 10-4:
Figure 10-5:
Figure 10-6:
DS40139A-page 80
Addressing................................................. 17
I/O Port ...................................................... 20
PIC12C5XX Block Diagram ......................... 8
Clock/Instruction Cycle .............................. 10
Program Memory Map and Stack for the
PIC12C5XX ............................................... 11
PIC12C508 Register File Map ................... 12
PIC12C509 Register File Map ................... 12
STATUS Register (Address:03h)............... 14
OPTION Register....................................... 15
Loading of PC Branch Instructions -
PIC12C508/C509....................................... 16
Direct/Indirect Addressing.......................... 17
Equivalent Circuit for a Single I/O Pin........ 19
Successive I/O Operation .......................... 20
Timer0 Block Diagram ............................... 21
Timer0 Timing: Internal Clock/
No Prescale ............................................... 22
Timer0 Timing: Internal Clock/
Prescale 1:2............................................... 22
Timer0 Timing With External Clock ........... 23
Block Diagram of the Timer0/
WDT Prescaler .......................................... 24
Configuration Word for PIC12C508 or
PIC12C509 ................................................ 25
Crystal Operation (or Ceramic Resonator)
(XT or LP OSC Configuration) ................... 26
External Clock Input Operation
(XT or LP OSC Configuration) ................... 26
External Parallel Resonant Crystal
Oscillator Circuit......................................... 27
External Series Resonant Crystal
Oscillator Circuit ......................................... 27
RC Oscillator Mode.................................... 28
MCLR Select.............................................. 29
Simplified Block Diagram of
On-Chip Reset Circuit................................ 30
Time-Out Sequence on Power-Up
(MCLR Pulled Low).................................... 31
Time-Out Sequence on Power-Up
(MCLR Tied to Vdd): Fast Vdd Rise Time . 31
Time-Out Sequence on Power-Up
(MCLR Tied to V
Watchdog Timer Block Diagram ................ 33
Brown-Out Protection Circuit 1 .................. 34
Brown-Out Protection Circuit 2 .................. 34
Typical In-Circuit Serial Programming
Connection................................................. 36
General Format for Instructions ................. 37
Load Conditions - PIC12C5XX .................. 56
External Clock Timing - PIC12C5XX ......... 57
Reset, Watchdog Timer, and Device
Reset Timer Timing - PIC12C5XX ............. 59
Timer0 Clock Timings - PIC12C5XX ......... 60
Calibrated Internal RC Frequency
Range vs. Temperature (V
I/O Timing - PIC12C5XX........................... 58
DD
): Slow Vdd Rise Time 31
DD
= 5.5V)........ 61
Advanced Information
Figure 10-7:
Figure 10-8:
Figure 10-9:
Figure 10-10: Calibrated Internal RC Frequency Range
LIST OF TABLES
Table 1-1:
Table 4-1:
Table 5-1:
Table 6-1:
Table 7-1:
Table 7-2:
Table 7-3:
Table 7-4:
Table 7-5:
Table 7-6:
Table 7-7:
Table 8-1:
Table 8-2:
Table 9-1:
Table 10-1:
Table 10-2:
Table 10-3:
Table 10-4:
Table 10-5:
Table 3-1:
Calibrated Internal RC Frequency Range
vs. Temperature (V
Calibrated Internal RC Frequency Range
vs. V
Calibrated Internal RC Frequency Range
vs. V
PIC12C5XX Family of Devices.................... 4
PIC12C5XX Pinout Description................... 9
Special Function Register Summary ......... 13
Summary of Port Registers ....................... 19
Registers Associated With Timer0 ............ 22
Capacitor Selection For Ceramic
Resonators - PIC12C5XX ......................... 26
Capacitor Selection For Crystal
Oscillator - PIC12C5XX............................. 26
Reset Conditions For Registers ................ 28
Reset Condition For Special Registers ..... 29
Summary of Registers Associated with
the Watchdog Timer .................................. 33
TO/PD/GPWUF Status After Reset........... 34
Events Affecting TO/PD Status Bits .......... 34
OPCODE Field Descriptions ..................... 37
Instruction Set Summary ........................... 38
Development Tools From Microchip.......... 52
External Clock Timing Requirements -
PIC12C5XX ............................................... 57
Timing Requirements - PIC12C5XX.......... 58
Reset, Watchdog Timer, and Device
Reset Timer - PIC12C5XX ........................ 59
Timer0 Clock Requirements -
PIC12C5XX ............................................... 60
MCLR Pull-up Resistor Ranges ................ 60
vs. V
DD
DD
DD
at Temperature = -40 C ............... 62
at Temperature = 25 C................. 62
at Temperature = 85 C................ 63
1996 Microchip Technology Inc.
DD
= 2.5V)................... 61