參數(shù)資料
型號(hào): MC68LC302PU16V
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 16.67 MHz, RISC MICROCONTROLLER, PQFP100
封裝: TQFP-100
文件頁(yè)數(shù): 79/182頁(yè)
文件大小: 618K
代理商: MC68LC302PU16V
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Configuration, Clocking, Low Power Modes, and Internal Memory Map
2-4
MC68LC302 REFERENCE MANUAL
MOTOROLA
and HALT. The chip-select (CS) lines are not asserted on ac-
cesses to these locations. Thus, it is very helpful to use CS lines
to select external ROM/RAM that overlaps the BAR and SCR
register locations, since this prevents potential bus contention.
NOTE
In 8-bit system bus operation, IMP accesses are not possible un-
til the low byte of the BAR is written. Since the MOVE.W instruc-
tion writes the high byte followed by the low byte, this instruction
guarantees the entire word is written.
Do not assign other devices on the system bus an address that falls within the address
range of the peripherals defined by the BAR. If this happens, an internal BERR is generated
to the core (if the address decode conflict enable (ADCE) bit is set) and the address decode
conflict (ADC) bit in the SCR is set.
2.2.1 Base Address Register
The BAR is a 16-bit, memory-mapped, read-write register consisting of the high address
bits, the compare function code bit, and the function code bits. Upon a total system reset, its
value may be read as $BFFF, but its value is not valid until written by the user. The address
of this register is fixed at $0F2 in supervisor data space. BAR cannot be accessed in user
data space.
Bits 15–13—FC2–FC0
The FC2–FC0 field is contained in bits 15–13 of the BAR. These bits are used to set the
address space of 4K-byte block of on-chip peripherals. The address compare logic uses
these bits, dependent upon the CFC bit, to cause an address match within its address
space. When the core is enabled, the function code bits will be driven by the core to indi-
cate the type of cycle in process. In disable CPU mode, the FC pins are not present and
are internally driven to 5. Since, the user does not have any control over how the FC sig-
nals are driven, it is recommended that the user write these bits to zero and write the CFC
bit to zero to disable the FC comparison.
NOTE
Do not assign this field to the M68000 core interrupt acknowledge space (FC2–FC0 = 7).
CFC—Compare Function Code
0 = The FC bits in the BAR are ignored. Accesses to the IMP 4K-byte block occur with-
out comparing the FC bits.
1 = The FC bits in the BAR are compared. The address space compare logic uses the
FC bits to detect address matches.
15
13
12
11
0
FC2–FC0
CFC
BASE ADDRESS
23
22
21
20
19
18
17
16
15
14
13
12
相關(guān)PDF資料
PDF描述
MC68LC302RC25B 32-BIT, 25 MHz, RISC MICROCONTROLLER, CPGA132
MC68LC302CPU16B 32-BIT, 16.67 MHz, RISC MICROCONTROLLER, PQFP100
MC68LC302PU16VB 32-BIT, 16.67 MHz, RISC MICROCONTROLLER, PQFP100
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MC68LC302PU16VCT 功能描述:IC MPU NETWORK 16MHZ 100-LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:M683xx 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA(25x25) 包裝:托盤
MC68LC302PU20CT 功能描述:微處理器 - MPU 20MHz 2MIPS 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
MC68LC302PU20VCT 功能描述:IC MPU NETWORK 20MHZ 100-LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:M683xx 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA(25x25) 包裝:托盤
MC68LC302PU25CT 功能描述:微處理器 - MPU 25MHz 2.5MIPS 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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