PIC18C858-E/L Microchip Technology, PIC18C858-E/L Datasheet - Page 109

• 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

9.0
The Parallel Slave Port is an 8-bit parallel interface for
transferring data between the PIC18CXX8 device and
an external device.
PORTD operates as an 8-bit wide Parallel Slave Port,
or microprocessor port when control bit PSPMODE
(PSPCON register) is set. In Slave mode, it is asyn-
chronously readable and writable by the external world
through RD control input pin RE0/RD and WR control
input pin RE1/WR.
It can directly interface to an 8-bit microprocessor data
bus. The external microprocessor can read or write the
PORTD latch as an 8-bit latch. Setting bit PSPMODE
enables port pin RE0/RD to be the RD input, RE1/WR
to be the WR input and RE2/CS to be the CS (chip
select) input. For this functionality, the corresponding
data direction bits of the TRISE register (TRISE<2:0>)
must be configured as inputs (set).
A write to the PSP occurs when both the CS and WR
lines are first detected low. A read from the PSP occurs
when both the CS and RD lines are first detected low.
The PORTE I/O pins become control inputs for the
microprocessor port when bit PSPMODE (PSPCON
Register) is set. In this mode, the user must make sure
that the TRISE<2:0> bits are set (pins are configured
as digital inputs). In this mode, the input buffers are
TTL.
 2000 Microchip Technology Inc.
PARALLEL SLAVE PORT
Advanced Information
FIGURE 9-1:
One bit of PORTD
Data Bus
Set Interrupt Flag
PSPIF (PIR1<7>)
Note:
WR LATD
WR PORTD
or
RD PORTD
I/O pins have diode protection to V
RD LATD
Data Latch
Q
D
CK
PORTD AND PORTE BLOCK
DIAGRAM
(PARALLEL SLAVE PORT)
EN
EN
Q
D
PIC18CXX8
Chip Select
Read
Write
DS30475A-page 109
TTL
DD
TTL
TTL
TTL
and V
SS
RDx Pin
.
CS
WR
RD