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PIC18F26J50-I/SP 用户编程技术手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
DIP-28
描述:
MICROCHIP PIC18F26J50-I/SP 微控制器, 8位, 闪存, PIC18FxxJxx, 48 MHz, 64 KB, 3.7 KB, 28 引脚, DIP
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PIC18F26J50-I/SP数据手册
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PIC18F2XJXX/4XJXX FAMILY
DS39687E-page 4 © 2009 Microchip Technology Inc.
2.1.1 PIC18F2XJXX/4XJXX/
LF2XJXX/LF4XJXX DEVICES AND
THE ON-CHIP VOLTAGE
REGULATOR
PIC18FXXJXX devices have an internal core voltage
regulator. On these devices (“PIC18F” in the part num-
ber), the regulator is always enabled. The regulator
input is taken from the microcontroller V
DD pins. The
output of the regulator is supplied to the V
DDCORE/VCAP
pin. On these devices, this pin simultaneously serves
as both the regulator output and the microcontroller
core power input pin. For these devices, the
V
DDCORE/VCAP pin should be tied to a capacitor and
nothing else.
PIC18LFXXJXX devices do not have an internal core
voltage regulator. On these devices (“PIC18LF” in the
part number), power must be externally supplied to
both V
DD and VDDCORE/VCAP.
Whether or not the regulator is used, it is always good
design practice to have sufficient capacitance on all
supply pins. Examples are shown in Figure 2-3.
The specifications for core voltage and capacitance are
listed in Section 6.0 “AC/DC Characteristics Timing
Requirements for Program/Verify Test Mode”.
FIGURE 2-3: CONNECTIONS FOR THE
ON-CHIP REGULATOR
2.2 Memory Maps
The PIC18F2XJXX/4XJXX family of devices offers
program memory sizes of 16, 32, 64 and 128 Kbytes.
The memory sizes for different members of the family
are shown in Table 2-2. The overall memory maps for
all the devices are shown in Figure 2-4.
TABLE 2-2: PROGRAM MEMORY SIZES
FOR PIC18F2XJXX/4XJXX
FAMILY DEVICES
For purposes of code protection, the program memory
for every device is treated as a single block. Enabling
code protection, thus protects the entire code memory,
and not individual segments.
2.5V
VDD
VDDCORE/VCAP
VSS
2.5V
VDD
VDDCORE/VCAP
VSS
3.3V
(V
DD = VDDCORE)
(V
DD ≥ VDDCORE)
PIC18F2XJXX/4XJXX Devices (Regulator Enabled)
PIC18F2XJXX/4XJXX
PIC18LF2XJXX/4XJXX Devices (Regulator Disabled)
V
DD
V
DDCORE
/V
CAP
V
SS
CF
3.3V
PIC18LF2XJXX/4XJXX
PIC18LF2XJXX/4XJXX
Device*
Program
Memory
(Kbytes)
Location of Flash
Configuration
Words
PIC18F24J10
16 3FF8h:3FFFh
PIC18F44J10
PIC18F24J11
PIC18F44J11
PIC18F24J50
PIC18F44J50
PIC18F25J10
32 7FF8h:7FFFh
PIC18F45J10
PIC18F25J11
PIC18F45J11
PIC18F25J50
PIC18F45J50
PIC18F26J11
64 FFF8h:FFFFh
PIC18F46J11
PIC18F26J13
PIC18F46J13
PIC18F26J50
PIC18F46J50
PIC18F26J53
PIC18F46J53
PIC18F27J13
128 1FFF8h:1FFFFh
PIC18F47J13
PIC18F27J53
PIC18F47J53
* Includes PIC18F and PIC18LF devices.
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