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參數資料
型號: MC68L11K4FU1
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8-BIT, MROM, 1 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數: 35/80頁
文件大小: 420K
代理商: MC68L11K4FU1
M68HC11 K Series
MC68HC11KTS/D
MOTOROLA
35
Bit 7 — Not implemented
Always reads zero
G2DPC — General-Purpose Chip Select 2 Drives Program Chip Select
0 = CSGP2 does not affect CSPROG
1 = CSGP2 and CSPROG are connected to an OR gate and driven out CSPROG
G2POL — General-Purpose Chip Select 2 Polarity Select
0 = CSGP2 active low
1 = CSGP2 active high
G2AV — General-Purpose Chip Select 2 Address Valid Select
0 = Active during E high time
1 = Active during address valid time
G2SZA–G2SZD — General-Purpose Chip Select 2 Size
4.3.6 Examples of Memory Expansion Using Chip Selects
On the following two pages are examples of memory expansion schemes that use chip select signals
to simplify the interface to the external memory devices. Although schematics are not provided, careful
study of the memory map diagram for each example will reveal the simplicity with which an expanded
system can be created. Both examples require a minimum of external circuitry as well as very little pro-
gram code.
This example is a system consisting of the MCU and a single 27C512-type memory device. This system
uses one chip select and has one window containing eight banks of eight Kbytes each. In this example,
a total of 64 Kbytes is added to the address range of the MCU. Three of the expansion address lines
(XA[15:13]) are used. Register values particular to this example are given below the diagram.
G2SZx
Valid Bits
(MXGS2 = 0)
None
ADDR[15:11]
ADDR[15:12]
ADDR[15:13]
ADDR[15:14]
ADDR15
None
None
None
None
None
None
None
Valid Bits
(MXGS2 = 1)
None
G2A[18:11]
G2A[18:12]
G2A[18:13]
G2A[18:14]
G2A[18:15]
G2A[18:16]
G2A[18:17]
G2A18
None
None
None
None
A
0
0
0
0
0
0
0
0
1
1
1
1
B
0
0
0
0
1
1
1
1
0
0
0
0
C
0
0
1
1
0
0
1
1
0
0
1
1
D
0
1
0
1
0
1
0
1
0
1
0
1
Size (Bytes)
Disabled
2 K
4 K
8 K
16 K
32 K
64 K
128 K
256 K
512 K
Follow Window 1
Follow Window 2
Default to 512 K
1100–1111
相關PDF資料
PDF描述
MC68L11K4FU3 8-BIT MICROCONTROLLER
MC68HC11K1VFN2 8-BIT MICROCONTROLLER
MC68HC11K1VFN3 8-BIT MICROCONTROLLER
MC68HC11K1VFN4 8-BIT MICROCONTROLLER
MC68HC711K4CFN2 8-BIT MICROCONTROLLER
相關代理商/技術參數
參數描述
MC68L711E9FN2 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68L711E9FNE2 功能描述:8位微控制器 -MCU 8B MCU LO VOLTAGE RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
MC68L711E9FU2 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68L711M2CFU 制造商:Freescale Semiconductor 功能描述:
MC68LC040FE20A 功能描述:微處理器 - MPU 32B W/ CACHE MMU RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數據總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數據 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 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324
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