MICRO CTRL 4K 4MHZ OTP 44PLCC

 

PIC16C74-04/L

Manufacturer Part NumberPIC16C74-04/L
DescriptionMICRO CTRL 4K 4MHZ OTP 44PLCC
ManufacturerMicrochip Technology
SeriesPIC® 16C
PIC16C74-04/L datasheets

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Specifications of PIC16C74-04/L

Core ProcessorPICCore Size8-Bit
Speed4MHzConnectivityI²C, SPI, UART/USART
PeripheralsPOR, PWM, WDTNumber Of I /o33
Program Memory Size7KB (4K x 14)Program Memory TypeOTP
Ram Size192 x 8Voltage - Supply (vcc/vdd)4 V ~ 6 V
Data ConvertersA/D 8x8bOscillator TypeExternal
Operating Temperature0°C ~ 70°CPackage / Case44-PLCC
For Use WithDVA16XL441 - ADAPTER DEVICE ICE 44PLCCLead Free Status / RoHS StatusRequest inventory verification / Request inventory verification
Eeprom Size-  
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PIC16C7X
4.2.2.1
STATUS REGISTER
Applicable Devices
72 73 73A 74 74A 76 77
The STATUS register, shown in Figure 4-7, contains the
arithmetic status of the ALU, the RESET status and the
bank select bits for data memory.
The STATUS register can be the destination for any
instruction, as with any other register. If the STATUS
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended.
FIGURE 4-7:
STATUS REGISTER (ADDRESS 03h, 83h, 103h, 183h)
R/W-0
R/W-0
R/W-0
R-1
IRP
RP1
RP0
TO
bit7
bit 7:
IRP: Register Bank Select bit (used for indirect addressing)
1 = Bank 2, 3 (100h - 1FFh)
0 = Bank 0, 1 (00h - FFh)
bit 6-5: RP1:RP0: Register Bank Select bits (used for direct addressing)
11 = Bank 3 (180h - 1FFh)
10 = Bank 2 (100h - 17Fh)
01 = Bank 1 (80h - FFh)
00 = Bank 0 (00h - 7Fh)
Each bank is 128 bytes
bit 4:
TO: Time-out bit
1 = After power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
bit 3:
PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 2:
Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1:
DC: Digit carry/borrow bit (ADDWF, ADDLW,SUBLW,SUBWF instructions) (for borrow the polarity is reversed)
1 = A carry-out from the 4th low order bit of the result occurred
0 = No carry-out from the 4th low order bit of the result
bit 0:
C: Carry/borrow bit (ADDWF, ADDLW,SUBLW,SUBWF instructions)
1 = A carry-out from the most significant bit of the result occurred
0 = No carry-out from the most significant bit of the result occurred
Note: For borrow the polarity is reversed. A subtraction is executed by adding the two’s complement of the
second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high or low order bit of
the source register.
DS30390E-page 30
For example, CLRF STATUS will clear the upper-three
bits and set the Z bit. This leaves the STATUS register
as 000u u1uu (where u = unchanged).
It is recommended, therefore, that only BCF, BSF,
SWAPF and MOVWF instructions are used to alter the
STATUS register because these instructions do not
affect the Z, C or DC bits from the STATUS register. For
other instructions, not affecting any status bits, see the
"Instruction Set Summary."
Note 1: For those devices that do not use bits IRP
and RP1 (STATUS<7:6>), maintain these
bits clear to ensure upward compatibility
with future products.
Note 2: The C and DC bits operate as a borrow
and digit borrow bit, respectively, in sub-
traction. See the SUBLW and SUBWF
instructions for examples.
R-1
R/W-x
R/W-x
R/W-x
PD
Z
DC
C
bit0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
read as ‘0’
- n = Value at POR reset
1997 Microchip Technology Inc.