參數(shù)資料
型號： MC68HC916X1CTH16
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP120
封裝： QFP-120
文件頁數(shù)： 27/172頁
文件大?。?/td> 1200K
代理商： MC68HC916X1CTH16
MOTOROLA
MC68HC916X1
122
MC68HC916X1TS/D
8.4 SRAM Operation
There are five SRAM operating modes. They include the following:
1.
The RAM module is in normal mode when powered by VDD. The array can be accessed by
byte, word, or long word. A byte or aligned word (high-order byte is at an even address)
access only takes one bus cycle or two system clocks. A long word or misaligned word ac-
cess requires two bus cycles.
2.
Standby mode is intended to preserve RAM contents when VDD is removed. SRAM con-
tents are maintained by a power source connected to the VSTBY pin. The standby voltage
is referred to as VSB. Circuitry within the SRAM module switches to the higher of VDD or
VSB with no loss of data. When SRAM is powered from the VSTBY pin, access to the array
is not guaranteed. If standby operation is not desired, connect the VSTBY pin to VSS.
3.
Reset mode allows the CPU to complete the current bus cycle before resetting. When a
synchronous reset occurs while a byte or word SRAM access is in progress, the access is
completed. If reset occurs during the first word access of a long-word operation, only the
first word access is completed. If reset occurs during the second word access of a long
word operation, the entire access is completed. Data being read from or written to the RAM
may be corrupted by asynchronous reset.
4.
Test mode is used for factory testing of the RAM array.
5.
Writing the STOP bit of RAMMCR causes the SRAM module to enter stop mode. The RAM
array is disabled which, if necessary, allows external logic to decode SRAM addresses but
all data is retained. If VDD falls below VSB, internal circuitry switches to VSB, as in standby
mode. Exit the stop mode by clearing the STOP bit.
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
MC916X1CTH16B1 16-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP120
SPMC916X1CTH16 16-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP120
MC68HCL05J1ADWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC05J1AVDWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HCP11A1CFNE3 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC52
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC98LJ12CFU 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HC98LJ12CFUE 功能描述:8位微控制器 -MCU 8 BIT MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
MC68HC9S08RC60 L33R DIE 制造商:Motorola Inc 功能描述:
MC68HCP11A1CFN3 功能描述:8位微控制器 -MCU 8-bit HCMOS single chip MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
MC68HCP11A1FN 制造商:MOTORALA 功能描述:
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

*
*
*