PIC18C858-E/L Microchip Technology, PIC18C858-E/L Datasheet - Page 60
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC18C858-E/L
Manufacturer Part Number
PIC18C858-E/L
Description
IC MCU OTP 16KX16 CAN 84PLCC
Manufacturer
Microchip Technology
Series
PIC® 18Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16C770-ISO.pdf
(8 pages)
3.PIC18C658-IPT.pdf
(366 pages)
4.PIC18C658-IPT.pdf
(16 pages)
5.PIC18C658-IPT.pdf
(16 pages)
6.PIC18C658-IPT.pdf
(16 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18C858-E/L
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16C770-ISO PDF datasheet #2
- PIC18C658-IPT PDF datasheet #3
- PIC18C658-IPT PDF datasheet #4
- PIC18C658-IPT PDF datasheet #5
- PIC18C658-IPT PDF datasheet #6
- Current page: 60 of 366
- Download datasheet (7Mb)
PIC18CXX8
4.10
The Access Bank is an architectural enhancement that
is very useful for C compiler code optimization. The
techniques used by the C compiler are also be useful
for programs written in assembly.
This data memory region can be used for:
• Intermediate computational values
• Local variables of subroutines
• Faster context saving/switching of variables
• Common variables
• Faster evaluation/control of SFR’s (no banking)
The Access Bank is comprised of the upper 160 bytes
in Bank 15 (SFR’s) and the lower 96 bytes in Bank 0.
These two sections will be referred to as Access Bank
High and Access Bank Low, respectively. Figure 4-4
indicates the Access Bank areas.
A bit in the instruction word specifies if the operation is
to occur in the bank specified by the BSR register, or in
the Access Bank.
When forced in the Access Bank (a = ’0’), the last
address in Access Bank Low is followed by the first
address in Access Bank High. Access Bank High maps
most of the Special Function Registers so that these
registers can be accessed without any software over-
head.
FIGURE 4-5:
DS30475A-page 60
Note 1: For register file map detail, see Table 4-2.
Access Bank
bank select
2: The access bit of the instruction can be used to force an override of the selected bank
3: The MOVFF instruction embeds the entire 12-bit address in the instruction.
(BSR<3:0>) to the registers of the Access Bank.
DIRECT ADDRESSING
BSR<3:0>
(2)
location select
7
Direct Addressing
Data
Memory
from opcode
Advanced Information
(1)
(3)
(3)
000h
0FFh
Bank 0
00h
4.11
The need for a large general purpose memory space
dictates a RAM banking scheme. The data memory is
partitioned into sixteen banks. When using direct
addressing, the BSR should be configured for the
desired bank.
BSR<3:0> holds the upper 4 bits of the 12-bit RAM
address. The BSR<7:4> bits will always read ’0’s, and
writes will have no effect.
A MOVLB instruction has been provided in the instruc-
tion set to assist in selecting banks.
If the currently selected bank is not implemented, any
read will return all '0's and all writes are ignored. The
STATUS register bits will be set/cleared as appropriate
for the instruction performed.
Each Bank extends up to FFh (256 bytes). All data
memory is implemented as static RAM.
A MOVFF instruction ignores the BSR, since the 12-bit
addresses are embedded into the instruction word.
Section 4.12 provides a description of indirect address-
ing, which allows linear addressing of the entire RAM
space.
0
100h
1FFh
Bank 1
01h
Bank Select Register (BSR)
2000 Microchip Technology Inc.
E00h
EFFh
Bank 14
0Eh
F00h
FFFh
Bank 15
0Fh
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