參數(shù)資料
型號(hào)： MC68HC000P20
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： Addendum to M68000 User Manual
中文描述： 32-BIT, 20 MHz, MICROPROCESSOR, PDIP64
封裝： PLASTIC, DIP-64
文件頁(yè)數(shù)： 5/26頁(yè)
文件大小： 124K
代理商： MC68HC000P20
5
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
power consumption to its quiescent value
low-power mode described below will be routinely tested as part of the MC68SEC000 test vectors provided
by Motorola.
1
while maintaining the internal state of the processor. The
To successfully enter the low-power mode, the MC68SEC000 must first be in the supervisor mode. A
recommended method for entering the low-power mode is to use the TRAP instruction, which causes the
processor to begin exception processing, thus entering the supervisor mode. External circuitry should
accomplish the following steps during the trap routine:
1.
Externally detect a write to the low-power address. You select this address which can be any address
in the 16 Mbyte addressing range of the MC68SEC000. A write to the low-power address can be
detected by polling A23–A0, R/W, and FC2–FC0. When the low-power address is detected, R/W is
a logic low, and the function codes have a five (101) on their output, the processor is writing to the
low-power address in supervisor mode and user-designed circuitry should assert the
ADDRESS_MATCH signal shown in Figure 2 and Figure 3.
Figure 3. MC68SEC000 Low-Power Circuitry for 8-Bit Data Bus
2.
Execute the STOP instruction. The external circuitry shown in Figure 2 and Figure 3 will count the
number of bus cycles starting with the write to the low-power address and will stop the processor
clock on the first falling edge of the system clock after the bus cycle that reads the immediate data
of the STOP instruction. Figure 3 has one more flip-flop than Figure 2 because the MC68SEC000 in
1.
The preliminary specification for the MC68SEC000’s current drain while in the low-power mode is Idd < 2
Idd < 5
μ
A for 5.0V operation.
μ
A for 3.3V operation and
Figure 2. MC68SEC000 Low-Power Circuitry for 16-Bit Data Bus
D
Q
Q
CL
CK
D
Q
CK
D
Q
CK
ADDRESS_MATCH
AS
RESTART
RESET
CPU_CLK
SYSTEM_CLK
Q
Q
AS
CL
D
Q
Q
CL
CK
D
Q
Q
CL
CK
D
Q
Q
CK
ADDRESS_MATCH
RESTART
RESET
CPU_CL
D
Q
Q
CL
CK
SYSTEM_CLK
AS
AS
AS
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC000P8 制造商:Motorola Inc 功能描述:
MC68HC000RC10 功能描述:微處理器 - MPU 16-BIT MPU RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68HC000RC12 功能描述:微處理器 - MPU 16-BIT MPU RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68HC000RC16 功能描述:微處理器 - MPU 16-BIT MPU RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68HC000RC8 功能描述:微處理器 - MPU 16-BIT MPU RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
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