PIC18C858-E/L Microchip Technology, PIC18C858-E/L Datasheet - Page 233

• Manufacturer Part Number: PIC18C858-E/L
• Description: IC MCU OTP 16KX16 CAN 84PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C858-E/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: OTP
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 84-PLCC
• For Use With: AC164310 - MODULE SKT FOR PM3 84PLCCDVA18XL840 - ADAPTER DEVICE ICE 84PLCCAC174012 - MODULE SKT PROMATEII 84PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: PIC18C858E/L

18.2
The A/D conversion time per bit is defined as T
A/D conversion requires 12 T
The source of the A/D conversion clock is software
selectable. There are seven possible options for T
For correct A/D conversions, the A/D conversion clock
(T
of 1.6 s.
Table 18-1 shows the resultant T
the device operating frequencies and the A/D clock
source selected.
TABLE 18-1:
Note 1: The RC source has a typical T
AD
2000 Microchip Technology Inc.
) must be selected to ensure a minimum T
• 2T
• 4T
• 8T
• 16T
• 32T
• 64T
• Internal RC oscillator
2: The RC source has a typical T
3: These values violate the minimum required T
4: For faster conversion times, the selection of another clock source is recommended.
5: For device frequencies above 1 MHz, the device must be in SLEEP for the entire conversion or the A/D
6: This column is for the LC devices only.
Selecting the A/D Conversion Clock
OSC
OSC
OSC
accuracy may be out of specification.
OSC
OSC
OSC
Operation
16T
32T
64T
2T
4T
8T
RC
OSC
OSC
OSC
OSC
OSC
OSC
AD Clock Source (T
T
AD
vs. DEVICE OPERATING FREQUENCIES
AD
per 10-bit conversion.
AD
times derived from
ADCS2:ADCS0
AD
AD
AD
)
Advanced Information
000
100
001
101
010
110
x11
time of 4 ms.
time of 6 ms.
AD
AD
. The
AD
time
:
AD
time.
18.3
The ADCON1, TRISA, TRISF and TRISH registers
control the operation of the A/D port pins. The port pins
needed as analog inputs must have their correspond-
ing TRIS bits set (input). If the TRIS bit is cleared (out-
put), the digital output level (V
converted.
The A/D operation is independent of the state of the
CHS3:CHS0 bits and the TRIS bits.
Note 1: When reading the port register, all pins
PIC18CXX8
1.25 MHz
2.50 MHz
5.00 MHz
10.0 MHz
20.0 MHz
40.0 MHz
—
2: Analog levels on any pin defined as a dig-
Configuring Analog Port Pins
Maximum Device Frequency
configured as analog input channels will
read as cleared (a low level). Pins config-
ured as digital inputs will convert an ana-
log input. Analog levels on a digitally
configured input will not affect the conver-
sion accuracy.
ital input may cause the input buffer to
consume current out of the device’s spec-
ification limits.
PIC18CXX8
PIC18LCXX8
OH
10.67 MHz
21.33 MHz
1.33 MHz
2.67 MHz
5.33 MHz
DS30475A-page 233
666 kHz
or V
—
OL
) will be
(6)