PIC16C642-04I/SO Microchip Technology, PIC16C642-04I/SO Datasheet - Page 21

• Manufacturer Part Number: PIC16C642-04I/SO
• Description: IC MCU OTP 4KX14 COMP 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C642-04I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, WDT
• Number Of I /o: 22
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 176 B
• Interface Type: RS- 232
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Data Rom Size: 176 B
• Height: 2.05 mm
• Length: 17.9 mm
• Supply Voltage (max): 6 V
• Supply Voltage (min): 4 V
• Width: 7.5 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

4.2.2.1
The STATUS register, shown in Figure 4-5, 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, like 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.
For example, CLRF STATUS will clear the upper-three
bits and set the Z bit. This leaves the STATUS register
as 000uu1uu (where u = unchanged).
FIGURE 4-5:
1996 Microchip Technology Inc.
bit7
bit 7:
bit 6-5: RP1:RP0 : Register Bank Select bits (used for direct addressing)
bit 4:
bit 3:
bit 2:
bit 1:
bit 0:
R/W-0
IRP
STATUS REGISTER
IRP: Register Bank Select bit (used for indirect addressing)
1 = Bank 2, 3 (100h - 1FFh)
0 = Bank 0, 1 (00h - FFh)
Bit IRP is reserved on the PIC16C64X & PIC16C66X, always maintain this bit clear.
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 RP1 is reserved on the PIC16C64X & PIC16C66X, always maintain this bit
clear.
TO : Time-out bit
1 = After power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
PD : Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
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
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
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.
R/W-0
RP1
STATUS REGISTER (ADDRESS 03h, 83h)
R/W-0
RP0
R-1
TO
R-1
PD
Preliminary
PIC16C64X & PIC16C66X
R/W-x
Z
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 any status bit. For other instructions, not affecting
any status bits, see the “Instruction Set Summary.”
R/W-x
Note 1: The IRP and RP1 bits (STATUS<7:6>) are
Note 2: The C and DC bits operate as a Borrow
DC
bit0
reserved
PIC16C66X and should be maintained
clear. Use of these bits as general pur-
pose R/W bits is NOT recommended,
since this may affect upward compatibility
with future products.
and Digit Borrow out bit, respectively, in
subtraction. See the SUBLW and SUBWF
instructions for examples.
R/W-x
C
R = Readable bit
W = Writable bit
U = Unimplemented bit,
- n = Value at POR reset
on
read as ‘0’
the
DS30559A-page 21
PIC16C64X
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