參數(shù)資料
型號(hào)： MC68331CAG25
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 18/84頁(yè)
文件大?。?/td> 0K
描述： IC MCU 32BIT 25MHZ 144-LQFP
標(biāo)準(zhǔn)包裝： 60
系列： M683xx
核心處理器： CPU32
芯體尺寸： 32-位
速度： 25MHz
連通性： EBI/EMI，SCI，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 18
程序存儲(chǔ)器類型： ROMless
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 144-LQFP
包裝： 托盤
MC68331TS/D
25
Port width is the maximum number of bits accepted or provided during a bus transfer. External devices
must follow the handshake protocol described below. Control signals indicate the beginning of the cycle,
the address space, the size of the transfer, and the type of cycle. The selected device controls the length
of the cycle. Strobe signals, one for the address bus and another for the data bus, indicate the validity
of an address and provide timing information for data. The EBI operates in an asynchronous mode for
any port width.
To add flexibility and minimize the necessity for external logic, MCU chip-select logic can be synchro-
nized with EBI transfers. Chip-select logic can also provide internally-generated bus control signals for
these accesses. Refer to 3.5 Chip Selects for more information.
3.4.1 Bus Control Signals
The CPU initiates a bus cycle by driving the address, size, function code, and read/write outputs. At the
beginning of the cycle, size signals SIZ0 and SIZ1 are driven along with the function code signals. The
size signals indicate the number of bytes remaining to be transferred during an operand cycle. They are
valid while the address strobe (AS) is asserted. The following table shows SIZ0 and SIZ1 encoding. The
read/write (R/W) signal determines the direction of the transfer during a bus cycle. This signal changes
state, when required, at the beginning of a bus cycle, and is valid while AS is asserted. R/W only chang-
es state when a write cycle is preceded by a read cycle or vice versa. The signal can remain low for two
consecutive write cycles.
3.4.2 Function Codes
The CPU32 automatically generates function code signals FC[2:0]. The function codes can be consid-
ered address extensions that automatically select one of eight address spaces to which an address ap-
plies. These spaces are designated as either user or supervisor, and program or data spaces. Address
space 7 is designated CPU space. CPU space is used for control information not normally associated
with read or write bus cycles. Function codes are valid while AS is asserted.
3.4.3 Address Bus
Address bus signals ADDR[23:0] define the address of the most significant byte to be transferred during
a bus cycle. The MCU places the address on the bus at the beginning of a bus cycle. The address is
valid while AS is asserted.
Table 8 Size Signal Encoding
SIZ1
SIZ0
Transfer Size
0
1
Byte
1
0
Word
1
Three Byte
0
Long Word
Table 9 CPU32 Address Space Encoding
FC2
FC1
FC0
Address Space
0
Reserved
0
1
User Data Space
0
1
0
User Program Space
0
1
Reserved
1
0
Reserved
1
0
1
Supervisor Data Space
1
0
Supervisor Program Space
1
CPU Space
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
SPC5516GBMLQ66 MCU POWERPC AN15 FIXED 144-LQFP
MCIMX355AVM5B IC MPU I.MX35 400MAPBGA
MC912D60AVFUE8 MCU 16BIT 80-QFP
MCIMX27MJP4A MPU IMX27 473-MAPBGA
MCIMX27VOP4A IC MPU I.MX27 REV 2.1 404-MAPBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68331CEH16 功能描述:32位微控制器 - MCU 32BIT MCU GPT SIM QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68331CEH20 功能描述:32位微控制器 - MCU 32B MCU GPT SIM QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68331CEH20 制造商:Freescale Semiconductor 功能描述:32-Bit Microcontroller IC
MC68331CEH25 功能描述:32位微控制器 - MCU 32B MCU GPT SIM QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲(chǔ)器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT
MC68331CEH25 制造商:Freescale Semiconductor 功能描述:32-Bit Microcontroller IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

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

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

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*