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參數(shù)資料
| 型號： | MC68HC05J3CP |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 11/74頁 |
| 文件大小： | 814K |
| 代理商： | MC68HC05J3CP |
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MC68HC05J3
MOTOROLA
2-3
MODES OF OPERATION AND PIN DESCRIPTIONS
2
Providing the oscillator is running at 4MHz, the serial data format is 9600 baud, low start bit, 8
data bits, high stop bit. The data is in hexadecimal form, not ASCII.
In the RAM bootloader mode all interrupt vectors are mapped to pseudo-vectors in RAM (refer to
Table 2-2). This allows programmers to use their own service-routine addresses. Each
pseudo-vector is allowed three bytes of space, rather than the two bytes for normal vectors,
because an explicit jump (JMP) opcode is needed to cause the desired jump to the user’s
service-routine address.
2.2
Pin descriptions
2.2.1
VDD and VSS
Power is supplied to the microcontroller using these two pins. VDD is the positive supply and VSS
is ground.
It is in the nature of CMOS designs that very fast signal transitions occur on the MCU pins. These
short rise and fall times place very high short-duration current demands on the power supply. To
prevent noise problems, special care must be taken to provide good power supply bypassing at
the MCU. Bypass capacitors should have good high-frequency characteristics and be as close to
Table 2-2 RAM bootloader mode jump vectors
Address
Pseudo-vector
0084
Software interrupt
0087
IRQ interrupt
008A
Core timer interrupt
008D
Input capture
0090
Output compare interrupt
0093
Timer overow interrupt
Figure 2-2 20-pin SOIC/DIP single chip and bootloader mode pin assignments
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VDD
PB2
TCMP/PB4
TCAP/PB5
OSC2
OSC1
RESET
PA7
PA1
PB3
PB1
PB0
VSS
IRQ
PA0
PA2
PA3
PA4
PA5
PA6
TPG
16
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PDF描述 |
|---|---|
| MC68HC05J3CDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
| MC68HC05J3P | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| MC68HC05J3DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
| MC68HC05J3CP | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| MC68HC05J3DW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05J3DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J3P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J5A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
| MC68HC05J5ADW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
| MC68HC05J5AJDW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
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