PIC18C801-I/L Microchip Technology, PIC18C801-I/L Datasheet - Page 67

• Manufacturer Part Number: PIC18C801-I/L
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,84PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C801-I/L

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Type: ROMless
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Processor Series: PIC18C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: 3-Wire, I2C, SPI, USART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 47
• Number Of Timers: 1 x 16 bit
• Operating Supply Voltage: 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: DV164005, ICE4000, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164310 - MODULE SKT FOR PM3 84PLCCXLT84L1 - SOCKET TRANSITION ICE 84PLCCAC174012 - MODULE SKT PROMATEII 84PLCC
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details
• Other names: PIC18C801-I/LR; PIC18C801-I/LR; PIC18C801I/L

5.3
The External Memory Interface can operate in 16-bit
mode. The mode selection is not software configurable,
but is programmable via the configuration bits.
The WM<1:0> bits in the MEMCON register determine
three types of connections in 16-bit mode. They are
referred to as:
• 16-bit Byte Write
• 16-bit Word Write
• 16-bit Byte Select
These three different configurations allow the designer
maximum flexibility in using 8-bit and 16-bit memory
devices.
FIGURE 5-5:
2001 Microchip Technology Inc.
Note 1: This signal only applies to Table Writes. See Section 6.0, Table Reads and Writes.
PIC18C801
16-bit Mode
AD<15:8>
A<19:16>
AD<7:0>
WRH
WRL
ALE
CS1
OE
16-BIT BYTE WRITE MODE EXAMPLE
Advance Information
373
373
D<7:0>
A<19:0>
D<15:8>
For all 16-bit modes, the Address Latch Enable (ALE)
pin indicates that the address bits A<15:0> are avail-
able on the External Memory Interface bus. Following
the address latch, the output enable signal (OE ) will
enable both bytes of program memory at once to form
a 16-bit instruction word.
In Byte Select mode, JEDEC standard FLASH memo-
ries will require BA0 for the byte address line, and one
I/O line, to select between byte and word mode. The
other 16-bit modes do not need BA0. JEDEC standard
static RAM memories will use the UB or UL signals for
byte selection.
5.3.1
Figure 5-5 shows an example of 16-bit Byte Write
mode for the PIC18C601/801.
16-BIT BYTE WRITE MODE
A<x:0>
D<7:0>
CE
OE
PIC18C601/801
(MSB)
WR
(1)
D<7:0>
DS39541A-page 67
A<x:0>
D<7:0>
CE
OE
(LSB)
WR
(1)