PIC16C642-20E/SO Microchip Technology, PIC16C642-20E/SO Datasheet - Page 37

• Manufacturer Part Number: PIC16C642-20E/SO
• Description: IC MCU OTP 4KX14 COMP 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C642-20E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• 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 ~ 125°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: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 125 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

FIGURE 5-10: PORTE BLOCK DIAGRAM (IN I/O PORT MODE)
TABLE 5-9:
TABLE 5-10:
Name
RE0/RD
RE1/WR
RE2/CS
Legend: ST = Schmitt Trigger input, TTL = TTL input
Note 1: Input buffers are Schmitt Triggers when in I/O mode and TTL buffers when in Parallel Slave Port Mode.
Address
09h
89h
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by PORTE.
1996 Microchip Technology Inc.
Name
PORTE
TRISE
Note: I/O pins have protection diodes to V
Data Bus
WR PORT
WR TRIS
RD PORT
PORTE FUNCTIONS
SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Bit#
bit0
bit1
bit2
Bit 7
IBF
—
Bit 6
OBF
—
Buffer Type
ST/TTL
ST/TTL
ST/TTL
TRIS Latch
IBOV
Bit 5
Data Latch
—
D
D
CK
CK
(1)
(1)
(1)
PSPMODE
Q
Q
Q
Q
RD TRIS
Input/output port pin or read control input in parallel slave port mode:
Input/output port pin or write control input in parallel slave port mode:
Input/output port pin or chip select control input in parallel slave port
mode:
Bit 4
—
DD
Preliminary
and V
PIC16C64X & PIC16C66X
WR
1 = Not a write operation
CS
1 = Device is not selected
0 = Device is selected
RD
1 = Not a read operation
0 = Read operation. Reads PORTD register (if chip selected)
0 = Write operation. Writes PORTD register (if chip selected)
Bit 3
—
—
SS
.
TRISE2
Bit 2
RE2
Q
TRISE1
Bit 1
RE1
EN
EN
Function
D
TRISE0
Bit 0
RE0
---- -xxx
0000 -111
Value on:
POR,
BOR
Schmitt
Trigger
input
buffer
DS30559A-page 37
I/O pin
other resets
Value on all
---- -uuu
0000 -111