PIC16C74B-20I/P Microchip Technology Inc., PIC16C74B-20I/P Datasheet - Page 96
PIC16C74B-20I/P
Manufacturer Part Number
PIC16C74B-20I/P
Description
40 PIN, 7 KB OTP, 192 RAM, 33 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C74B-20IP.pdf
(184 pages)
Specifications of PIC16C74B-20I/P
A/d Inputs
8-Channel, 8-Bit
Cpu Speed
5 MIPS
Eeprom Memory
0 Bytes
Input Output
33
Interface
I2C/SPI/USART
Memory Type
OTP
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
7K Bytes
Ram Size
192 Bytes
Speed
4 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2.5-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC16C63A/65B/73B/74B
13.7.2
It should also be taken into account that under worst
case conditions (V
max. WDT prescaler), it may take several seconds
before a WDT time-out occurs.
FIGURE 13-6:
TABLE 13-7:
DS30605C-page 96
2007h
81h
Legend: Shaded cells are not used by the Watchdog Timer.
Note 1: See Register 13-1 for operation of these bits.
Address
Note:
Note: PSA and PS2:PS0 are bits in the OPTION register.
When a CLRWDT instruction is executed
and the prescaler is assigned to the WDT,
the prescaler count will be cleared, but the
prescaler assignment is not changed.
WDT PROGRAMMING
CONSIDERATIONS
Config. bits
OPTION_REG
Name
SUMMARY OF WATCHDOG TIMER REGISTERS
DD
= Min., Temperature = Max., and
WATCHDOG TIMER BLOCK DIAGRAM
WDT Timer
Enable Bit
WDT
RBPU
Bit 7
From TMR0 Clock Source
(Figure 6-1)
–
BODEN
INTEDG
Bit 6
0
1
(1)
PSA
M
U
X
T0CS
Bit 5
CP1
T0SE
Bit 4
CP0
0
Time-out
8 - to - 1 MUX
MUX
WDT
Postscaler
PWRTE
1
Bit 3
PSA
8
(1)
PSA
To TMR0 MUX (Figure 6-1)
WDTE
Bit 2
PS2
2000 Microchip Technology Inc.
PS2:PS0
FOSC1
Bit 1
PS1
FOSC0
Bit 0
PS0
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