PIC16F946-E/PT Microchip Technology, PIC16F946-E/PT Datasheet - Page 63

• Manufacturer Part Number: PIC16F946-E/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 352 B
• Interface Type: SSP, I2C, AUSART, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, MA160011
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / Rohs Status: Details

3.6
PORTE is a 4-bit port with Schmitt Trigger input buffers.
RE<7:0> are individually configured as inputs or out-
puts. RE3 is only available as an input if MCLRE is ‘0’
in Configuration Word (Register 16-1). .
REGISTER 3-11:
REGISTER 3-12:
© 2005 Microchip Technology Inc.
Note:
PORTE and TRISE Registers
bit 7-0
bit 7-4
bit 3
bit 2-0
Analog lines that carry LCD signals
(i.e., SEGx, where x are segment identifi-
ers) are shown as direct connections to
the device pins. The signals are outputs
from the LCD module and may be
tri-stated, depending on the configuration
of the LCD module.
PORTE – PORTE REGISTER (ADDRESS: 09h)
TRISE – PORTE TRI-STATE REGISTER (ADDRESS: 89h)
bit 7
RE<7:0>: PORTE I/O Pin bits
1 = Port pin is >V
0 = Port pin is <V
Legend:
R = Readable bit
- n = Value at POR
bit 7
TRISE<7:4>: Data Direction bits
TRISE3: Data Direction bit. RE3 is always an input, so this bit always reads as a ‘1’
TRISE<2:0>: Data Direction bits
Legend:
R = Readable bit
- n = Value at POR
TRISE7
R/W-x
R/W-1
RE7
TRISE6
R/W-x
R/W-1
RE6
IH
IL
TRISE5
R/W-x
R/W-1
RE5
Preliminary
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
TRISE4
R/W-x
R/W-1
RE4
EXAMPLE 3-5:
BCF
BCF
CLRF
BSF
BCF
MOVLW
MOVWF
CLRF
BCF
BCF
TRISE3
R/W-x
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
STATUS,RP0
STATUS,RP1
PORTE
STATUS,RP0
STATUS,RP1
0Fh
TRISE
ANSEL
STATUS,RP0
STATUS,RP1
RE3
R-1
TRISE2
R/W-x
R/W-1
RE2
INITIALIZING PORTE
PIC16F946
;Bank 0
;
;Init PORTE
;Bank 1
;
;Set RE<3:0> as inputs
;
;Make RE<2:0> as I/O’s
;Bank 0
;
x = Bit is unknown
x = Bit is unknown
TRISE1
R/W-x
R/W-1
RE1
DS41265A-page 61
TRISE0
R/W-x
R/W-1
RE0
bit 0
bit 0