PIC16C505-04E/SL Microchip Technology, PIC16C505-04E/SL Datasheet - Page 35
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PIC16C505-04E/SL
Manufacturer Part Number
PIC16C505-04E/SL
Description
IC MCU OTP 1KX12 14SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Specifications of PIC16C505-04E/SL
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
11
Program Memory Size
1.5KB (1K x 12)
Program Memory Type
OTP
Ram Size
72 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
For Use With
309-1086 - ADAPTER 14-ZIF BD W/14-SO PLUGS309-1085 - ADAPTER 14-DIP BD W/2 14-SO PLUG309-1001 - ADAPTER 14-SOIC TO 14-DIP309-1000 - ADAPTER 14-SOIC TO 14-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Connectivity
-
7.6.1
The WDT has a nominal time-out period of 18 ms,
(with no prescaler). If a longer time-out period is
desired, a prescaler with a division ratio of up to 1:128
can be assigned to the WDT (under software control)
by writing to the OPTION register. Thus, a time-out
period of a nominal 2.3 seconds can be realized.
These periods vary with temperature, V
part process variations (see DC specs).
Under worst case conditions (V
= Max., max. WDT prescaler), it may take several
seconds before a WDT time-out occurs.
FIGURE 7-11: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 7-6:
N/A
Legend: Shaded boxes = Not used by Watchdog Timer, — = unimplemented, read as '0', u = unchanged.
Address
1999 Microchip Technology Inc.
WDT PERIOD
OPTION
Name
Note: T0CS, T0SE, PSA, PS<2:0>
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
Configuration Bit
WDT Enable
Watchdog
are bits in the OPTION register.
Timer
RBWU
Bit 7
From Timer0 Clock Source
(Figure 6-5)
DD
= Min., Temperature
RBPU
Bit 6
DD
and part-to-
T0CS
1
0
Bit 5
PSA
M
U
X
T0SE
Bit 4
Bit 3
PSA
0
7.6.2
The CLRWDT instruction clears the WDT and the
postscaler, if assigned to the WDT, and prevents it
from timing out and generating a device RESET.
The SLEEP instruction resets the WDT and the
postscaler, if assigned to the WDT. This gives the
maximum SLEEP time before a WDT wake-up reset.
Time-out
8 - to - 1 MUX
WDT
MUX
Postscaler
Postscaler
Bit 2
PS2
1
WDT PROGRAMMING CONSIDERATIONS
Bit 1
PS1
PSA
To Timer0 (Figure 6-4)
Bit 0
PS0
PS<2:0>
PIC16C505
1111 1111
Power-On
Value on
Reset
DS40192C-page 35
1111 1111
All Other
Value on
Resets