参数资料
型号: MCHC11F1CFNE3R
厂商: Freescale Semiconductor
文件页数: 111/158页
文件大小: 0K
描述: MCU 8BIT 1KRAM 512EE 68-PLCC
标准包装: 250
系列: HC11
核心处理器: HC11
芯体尺寸: 8-位
速度: 3MHz
连通性: SCI,SPI
外围设备: POR,WDT
输入/输出数: 30
程序存储器类型: ROMless
EEPROM 大小: 512 x 8
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.75 V ~ 5.25 V
数据转换器: A/D 8x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 68-LCC(J 形引线)
包装: 带卷 (TR)
OPERATING MODES AND ON-CHIP MEMORY
MC68HC11F1
4-18
TECHNICAL DATA
For a description of the bits contained in the CONFIG register refer to 4.3.2.1 CONFIG
4.5 Chip Selects
The function of the chip selects is to minimize the amount of external glue logic needed
to interface the MCU to external devices. The MC68HC11F1 has four software config-
ured chip selects that can be enabled in expanded modes. The chip selects for I/O
(CSIO1 and CSIO2) are used for I/O expansion. The program chip select (CSPROG)
is used with an external memory that contains the program code and reset vectors.
The general-purpose chip select (CSGEN) is the most flexible and is used to enable
external devices.
Such factors as polarity, block size, base address and clock stretching can be con-
trolled using the four chip-select control registers. When a port G pin is not used for
chip select functions it can be used for general-purpose I/O.
When enabled, a chip select signal is asserted whenever the CPU makes an access
to a designated range of addresses. Bus control signals and chip select signals are
synchronous with the external E clock signal. For more information refer to Table A–
7. Expansion Bus Timing in APPENDIX A ELECTRICAL CHARACTERISTICS. The
length of the external E clock cycle to which the external device is synchronized can
be stretched to accommodate devices that are slower than the MCU.
4.5.1 Program Chip Select
The program chip select (CSPROG) is active in the range of memory where the main
program exists. Refer to Figure 4-3.
When enabled, the CSPROG is active during address valid time and is an active-low
signal. Although the general-purpose chip select has priority over the program chip se-
lect, CSPROG can be raised to a higher priority level by setting the GCSPR bit in
CSCTL register. Bits in CSCTL enable the program chip select and determine its ad-
dress range and priority level. Bits in CSSTRH select from zero to three clock cycles
of delay.
4.5.2 I/O Chip Selects
The I/O chip selects (CSIO1 and CSIO2) are fixed in size and fill the remainder of the
4-Kbyte block occupied by the register block. CSIO1 is mapped at $x060–$x7FF and
CSIO2 is mapped at $x800–$xFFF, where “x” corresponds to the high-order nibble of
the register block base address, represented by the value contained in REG[3:0] in the
INIT register.
Bits in the CSCTL register determine the polarity of the active state and enable both I/
O chip selects. Bits in CSGSIZ select whether each chip select is active for address-
valid or E-valid time. Bits in CSSTRH select from zero to three clock cycles of delay.
Refer to Figure 4-3.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料
PDF描述
EGG.1B.308.CLL CONN RCPT 8POS PNL MNT SKT W/NUT
FGG.1B.304.CLAD52Z CONN PLUG 4POS STRGHT PIN SOLDER
VI-BVN-IX-B1 CONVERTER MOD DC/DC 18.5V 75W
VI-BVL-IX-B1 CONVERTER MOD DC/DC 28V 75W
MC9328MX21SVKR2 IC MCU I.MX21 266MHZ 289-MAPBGA
相关代理商/技术参数
参数描述
MCHC11F1CFNE4 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MCHC11F1CFNE4R 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MCHC11F1CFNE5 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MCHC11F1MFNE4 制造商:Freescale Semiconductor 功能描述:8-BIT MCU,1KRAM,512EE,A/ - Rail/Tube
MCHC11F1VFNE3 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512EE RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT