PIC18F8390T-I/PT Microchip Technology, PIC18F8390T-I/PT Datasheet - Page 265

• Manufacturer Part Number: PIC18F8390T-I/PT
• Description: IC PIC MCU FLASH 4KX16 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8390T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
• Number Of I /o: 66
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI, I2C, EUSART, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 66
• Number Of Timers: 1 x 8
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM163028
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPDM163028 - BOARD DEMO PICDEM LCDAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

22.3
The LCD driver module can be configured into three
bias types:
• Static Bias (2 voltage levels: AV
• 1/2 Bias (3 voltage levels: AV
• 1/3 Bias (4 voltage levels: AV
This module uses an external resistor ladder to
generate the LCD bias voltages.
The external resistor ladder should be connected to the
Bias 1 pin, Bias 2 pin, Bias 3 pin and V
pin should also be connected to AV
Figure 22-3 shows the proper way to connect the
resistor ladder to the Bias pins.
22.4
The LCD driver module can be configured into four
multiplex types:
• Static (only COM0 used)
• 1/2 multiplex (COM0 and COM1 are used)
• 1/3 multiplex (COM0, COM1 and COM2 are used)
• 1/4 multiplex (all COM0, COM1, COM2 and COM3
The LMUX1:LMUX0 setting decides the function of the
PORTE<6:4> bits (see Table 22-3 for details).
FIGURE 22-3:
© 2007 Microchip Technology Inc.
AV
and AV
are used)
* These values are provided for design guidance only and should be optimized for the application by the designer.
AV
AV
AV
DD
DD
DD
DD
)
*
*
*
LCD Bias Types
LCD Multiplex Types
DD
)
LCD Bias 3
10 kΩ*
10 kΩ*
LCD BIAS RESISTOR LADDER CONNECTION DIAGRAM
LCD Bias 2
SS
SS
10 kΩ*
, 1/3 AV
SS
, 1/2 AV
DD
and AV
.
SS
DD
DD
. The Bias 3
, 2/3 AV
DD
LCD Bias 1
and
PIC18F6390/6490/8390/8490
)
10 kΩ*
10 kΩ*
DD
V
V
V
V
LCD
LCD
LCD
LCD
If the pin is a digital I/O, the corresponding TRIS bit
controls the data direction. If the pin is a COM drive,
then the TRIS setting of that pin is overridden.
TABLE 22-3:
22.5
The LCDSEx registers are used to select the pin
function for each segment pin. The selection allows
each pin to operate as either an LCD segment driver or
a digital only pin. To configure the pin as a segment pin,
the corresponding bits in the LCDSEx registers must
be set to ‘1’.
If the pin is a digital I/O, the corresponding TRIS bit
controls the data direction. Any bit set in the LCDSEx
registers overrides any bit settings in the corresponding
TRIS register.
3
2
1
0
LMUX1:
LMUX0
Note:
Note:
To
LCD
Driver
00
01
10
11
AV
AV
Connections for External R-ladder
SS
SS
Segment Enables
COM3 Driver COM2 Driver COM1 Driver
On a Power-on Reset, the LMUX1:LMUX0
bits are ‘00’.
On a Power-on Reset, these pins are
configured as digital I/O.
PORTE<6>
V
V
V
V
Digital I/O
Digital I/O
Digital I/O
Static Bias
LCD
LCD
LCD
LCD
1/2 Bias
1/3 Bias
PORTE<6:4> FUNCTION
0
1
2
3
Static
AV
AV
Bias
—
—
COM2 Driver COM1 Driver
SS
DD
PORTE<5>
Digital I/O
Digital I/O
1/2 AV
1/2 AV
1/2 Bias 1/3 Bias
AV
AV
DS39629C-page 263
SS
DD
DD
DD
COM1 Driver
PORTE<4>
Digital I/O
1/3 AV
2/3 AV
AV
AV
SS
DD
DD
DD