雖然發現網上很多人使用 PIC24F64GA002 MCU 作 DIY，但筆者選擇了 Microchip（微芯）PIC24FJ64GA008，主要是手上已經有這枚 MCU，它是 PIC24FJ64GA010 系列中的其中一款 MCU，CPU 模組採用 16 位元（16-bit Microcontroller）資料改進型哈佛架構，支援增強的指令集，指令字長 24 位元，帶有變數長度操作碼欄位。程式計數器（PC）為 23 位寬（23-bit），TQFP 80-Pin 封裝，程式存儲器是 64KB（64 KB Flash Memory），SRAM 8KB（8 KB RAM）。
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| Microchip PIC24FJ64GA008 MCU（Microcontroller / 微控制器） |
PIC24FJ64GA008 MCU 特性：
Parameter Name
|
Specification
|
Architecture
|
16-bit
|
CPU Speed (MIPS)
|
16 MIPS
|
Memory Type
|
Flash
|
Program Memory (KB)
|
64
|
RAM Bytes
|
8192
|
Temperature Range C
|
-40 to +85°C
|
Operating Voltage
Range (V)
|
2 to 3.6V
|
I/O Pins
|
69
|
System Management Features
|
BOR，POR，WDT
|
Internal Oscillator
|
8 MHz，32 kHz，Max 32MHz
|
nanoWatt Features
|
Fast Wake/Fast Control
|
Digital Communication Peripherals
|
2-UART，2-SPI，2-I2C
|
Analog Peripherals
|
1-A/D，16 x 10-bit @ 500（ksps）
|
Comparators
|
2
|
USB (ch, speed, compliance)
|
0，None
|
Capture/Compare/PWM Peripherals
|
5/5
|
PWM Resolution bits
|
16
|
Timers
|
5 x 16-bit，2 x 32-bit
|
Parallel Port
|
PMP
|
Hardware RTCC
|
YES
|
Cap Touch Channels
|
16
|
Packageing
|
TQFP80，12 x 12 x 1.05mm
|
Reference Price
|
US$3.35（HK$26.13）@
microchipdirect
|
PIC24FJ64GA008 MCU TQFP 80 Pins 定義：
No.
|
Function
|
No.
|
Function
|
No.
|
Function
|
No.
|
Function
|
1
|
PMD5/RE5
|
21
|
OGC2/EMUC2/AN6/OCFA/RB6
|
41
|
U1TX/RF3
|
61
|
OC2/RD1
|
2
|
PMD6/RE6
|
22
|
PGD2/EMUD2/AN7/RB7
|
42
|
U1RX/RF2
|
62
|
OC3/RD2
|
3
|
PMD7/RE7
|
23
|
PMA7/VREF-/RA9
|
43
|
SDO1/RF8
|
63
|
PMBE/OC4/RD3
|
4
|
T2CK/RC1
|
24
|
PMA6/VREF+/RA10
|
44
|
SDI1/RF7
|
64
|
IC5/RD12
|
5
|
T4CK/RC3
|
25
|
AVDD
|
45
|
SCK1/INT0/RF6
|
65
|
CN19/RD13
|
6
|
PMA5/SCK2/CN8/RG6
|
26
|
AVSS
|
46
|
SDA1/RG3
|
66
|
PMWR/OC5/CN13/RD4
|
7
|
PMA4/SDI2/CN9/RG7
|
27
|
U2CTS/C1OUT/AN8/RB8
|
47
|
SCL1/RG2
|
67
|
PMRD/CN14/RD5
|
8
|
PMA3/SDO2/CN10/RG8
|
28
|
C2OUT/AN9/RB9
|
48
|
VDD
|
68
|
CN15/RD6
|
9
|
-MCLR
|
29
|
PMA13/CVREF/AN10/RB10
|
49
|
OSC1/CLKI/RC12
|
69
|
CN16/RD7
|
10
|
PMA2/SS2/CN11/RG9
|
30
|
PMA12/AN11/RB11
|
50
|
OSC2/CLKO/RC15
|
70
|
VCAP/VDDCORE
|
11
|
VSS
|
31
|
VSS
|
51
|
VSS
|
71
|
ENVREG
|
12
|
VDD
|
32
|
VDD
|
52
|
SCL2/INT3/RA14
|
72
|
RF0
|
13
|
TMS/INT1/RE8
|
33
|
TCK/PMA11/AN12/RB12
|
53
|
SDA2/INT4/RA15
|
73
|
RF1
|
14
|
TDO/INT2/RE9
|
34
|
TDI/PMA10/AN13/RB13
|
54
|
IC1/RTCC/RD8
|
74
|
RG1
|
15
|
C1IN+/AN5/CN7/RB5
|
35
|
PMA1/U2RTS/BCLK2/AN14/RB14
|
55
|
IC2/RD9
|
75
|
RG0
|
16
|
C1IN-/AN4/CN6/RB4
|
36
|
PMA0/AN15/OCFB/AN12/RB15
|
56
|
IC3/PMCS2/RD10
|
76
|
PMD0/RE0
|
17
|
C2IN+/AN3/CN5/RB3
|
37
|
U1CTS/CN20/RD14
|
57
|
IC4/PMCS1/RD11
|
77
|
PMD1/RE1
|
18
|
C2IN-/AN2/SS1/CN4/RB2
|
38
|
U1RTS/BCLK1/CN21/RD15
|
58
|
OC1/RD0
|
78
|
PMD2/RE2
|
19
|
PGC1/EMUC1/AN1/CN3/RB1
|
39
|
PMA9/U2RX/CN17/RF4
|
59
|
SOSCI/CN1/RC13
|
79
|
PMD3/RE3
|
20
|
PGD1/EMUC1/AN0/CN2/RB0
|
40
|
PMA8/U2TX/CN18/RF5
|
60
|
SOSCO/T1CK/CN0/RC14
|
80
|
PMD4/RE4
|
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