PIC16C621-04/SO Microchip Technology, PIC16C621-04/SO Datasheet - Page 6

• Manufacturer Part Number: PIC16C621-04/SO
• Description: IC MCU OTP 1KX14 COMP 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C621-04/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 1.75KB (1K x 14)
• Program Memory Type: OTP
• Ram Size: 80 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

PIC16C62X
2. Module: Oscillator
The Oscillator Start-up Timer (T
occur when the device wakes up from SLEEP.
Figure 2 shows the start-up of the crystal after the
event that causes the device to wake-up from SLEEP
mode (as specified in the Device Data Sheet). The
start-up time (T
FIGURE 2:
In applications where time-based measurements are
started immediately after wake-up from SLEEP, the
suggested work around should be implemented.
DS80101D-page 6
INSTRUCTION FLOW
CLKOUT
Note 1:
Instruction
Instruction
Executed
Fetched
OSC1
2:
3:
PC
(4)
For T
T
CLKOUT is not available in these
OST
Inst(PC) = SLEEP
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
OST
OST
= 1024T
Inst(PC - 1)
WAKE-UP FROM SLEEP
) may not occur.
delay to be enabled, the XT, HS, or LP Oscillator mode must be selected.
PC
OSC
, This delay may not occur, and every valid clock edge will generate internal device clocks.
Inst(PC + 1)
SLEEP
PC+1
OST
) delay may not
OSC
modes, but shown here for timing reference.
—
Wake-up Event Occurs
T
OST
(2)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
The events that wake-up the device from SLEEP are:
• An interrupt
• A WDT overflow (wake-up)
• A Brown-out Reset
• A MCLR Reset
Work around
After the SLEEP instruction, do a software delay of 256
T
vector addresses, test to see if the device woke from
SLEEP (the TO and PD bits), and if the device did wake
from SLEEP, ensure that the total cycle delay is 256
T
CY
CY
T
CY
.
(same as 1024 T
T
CY
OSC
 2004 Microchip Technology Inc.
). At the RESET and Interrupt
T
CY
T
CY