參數(shù)資料
型號： MC16S2CPU20B1
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, 20.97 MHz, MICROCONTROLLER, PQFP100
封裝： TQFP-100
文件頁數(shù)： 29/104頁
文件大?。?/td> 812K
代理商： MC16S2CPU20B1
MOTOROLA
MC68HC16S2
30
MC68HC16S2TS/D
3.6.1 Chip-Select Registers
Each chip-select pin can have one or more functions. Chip-select pin assignment registers CSPAR[0:1]
determine functions of the pins. Pin assignment registers also determine port size for dynamic bus al-
location. A pin data register (PORTC) latches data for chip-select pins that are used for discrete output.
Blocks of addresses are assigned to each chip-select function. Block sizes of two Kbytes to one Mbyte
can be selected by writing values to the appropriate base address registers CSBARBT and
CSBAR[0:10]. However, because the logic state of ADDR20 is always the same as the state of ADDR19
in the MC68HC16S2, the largest usable block size is 512 Kbytes. Multiple chip-selects assigned to the
same block of addresses must have the same number of wait states.
Chip-select option registers CSORBT and CSOR[0:10] determine timing of and conditions for assertion
of chip-select signals. Eight parameters, including operating mode, access size, synchronization, and
wait state insertion can be specified.
Initialization software usually resides in a peripheral memory device controlled by the chip-select cir-
cuits. CSBOOT and registers CSORBT and CSBARBT are provided to support bootstrap operation.
3.6.2 Pin Assignment Registers
The pin assignment registers contain twelve 2-bit fields that determine functions of the chip-select pins.
Each pin has two or three possible functions, as shown in Table 18.
Table 19 shows pin assignment field encoding. Pins that have no discrete output function do not use
the %00 encoding.
Table 18 Chip-Select Pin Functions
Assignment
Register
16-Bit
Chip-Select
Alternate
Function
Discrete
Output
CSPAR0
CSBOOT
—
CS0
BR
—
CS1
BG
—
CS2
BGACK
—
CS3
FC0
PC0
CS4
FC1
PC1
CS5
FC2
PC2
CSPAR1
CS6
ADDR19
PC3
CS7
ADDR20
PC4
CS8
ADDR21
PC5
CS9
ADDR22
PC6
CS10
ADDR23
ECLK
Table 19 Pin Assignment Encodings
Bit Field
Description
00
Discrete output
01
Alternate function
10
Chip-select (8-bit port)
11
Chip-select (16-bit port)
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
..
.
相關(guān)PDF資料
PDF描述
MC68HC16X1CTH 16-BIT, MROM, 16.78 MHz, MICROCONTROLLER, PQFP120
MC68HC24VP 16 I/O, PIA-GENERAL PURPOSE, PDIP40
MC68HC33CFG 48 I/O, PIA-GENERAL PURPOSE, PQFP100
MC68HC33FG 48 I/O, PIA-GENERAL PURPOSE, PQFP100
MC68HC56FN 1 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PQCC28
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC16XSD200FK 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Dual 16 mOhm High Side Switch
MC16Z1CFC25B1 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC16Z1CPV20B1 制造商:Rochester Electronics LLC 功能描述:16 BIT MCU, 1K RAM - Bulk
MC16Z3BCAG16 功能描述:16位微控制器 - MCU 16BIT MCU 4KRAM 8KROM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MC-17 功能描述:TERM BARRIER 17CIRC DUAL ROW RoHS:是 類別:連接器，互連式 >> 接線座 - 隔板塊 系列:M 標(biāo)準(zhǔn)包裝:10 系列:Beau™ 38780 端接塊類型:阻隔塊 電路數(shù):15 導(dǎo)線入口數(shù)目:30 間距:0.438"（11.12mm） 行數(shù):2 電流:15A 電壓:300V 線規(guī):14-22 AWG 頂部端子:螺釘 底部端子:焊片 阻擋層類型:雙壁（雙） 特點:法蘭 顏色:黑 包裝:散裝 安裝類型:通孔 工作溫度:- 材料 - 絕緣體:聚對苯二甲酸丁二酯（PBT），玻璃纖維增強(qiáng)型 材料可燃性額定值:UL94 V-0 其它名稱:038780-111538780-1115387801115
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*