參數(shù)資料
型號： MC68HCP11A1CP3
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： HCMOS Single-Chip Microcontroller
中文描述： 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PDIP48
封裝： DIP-48
文件頁數(shù)： 91/158頁
文件大小： 776K
代理商： MC68HCP11A1CP3
MC68HC11A8
TECHNICAL DATA
RESETS, INTERRUPTS, AND LOW POWER MODES
MOTOROLA
9-11
9
When set, upon reset in bootstrap mode only, the small bootstrap loader program is
enabled. When clear, by reset in the other three modes, this ROM is disabled and ac-
cesses to this area are treated as external accesses.
SMOD — Special Mode
The special mode bit reflects the inverse of the MODB input pin at the rising edge of
reset. It is set if the MODB pin is low during reset. If MODB is high during reset, it is
cleared. This bit may be cleared under software control from the special modes, thus,
changing the operating mode of the MCU, but may never be set by software.
MDA — Mode Select A
The mode select A bit reflects the status of the MODA input pin at the rising edge of
reset. While the SMOD bit is set (special bootstrap or special test mode in effect) the
MDA bit may be written, thus, changing the operating mode, of the MCU. When the
SMOD bit is clear, the MDA bit is a read-only bit and the operating mode cannot be
changed without going through a reset sequence.
Table 9-5
summarizes the relationship between the SMOD and MDA bits and the
MODB and MODA input pins at the rising edge of reset.
IRV — Internal Read Visibility
The internal read visibility bit is used in the special modes (SMOD = 1) to affect visibil-
ity of internal reads on the expansion data bus. IRV is writeable only if SMOD = 1 and
returns to zero if SMOD = 0. If IRV is clear, visibility of internal reads is blocked. If the
bit is set, internal reads are visible on the external bus.
PSEL3, PSEL2, PSEL1, and PSEL0 — Priority Select
These four priority select bits are used to specify one I bit related interrupt source
which becomes the highest priority I bit related source (
Table 9-6
). These bits may be
written only while the I bit in CCR = 1 (interrupts masked).
Table 9-5 Mode Bits Relationship
Inputs
Mode Description
Latched at Reset
SMOD
0
0
1
1
MODB
1
1
0
0
1 = Logic High
MODA
0
1
0
1
MDA
0
1
0
1
Single Chip
Expanded Multiplexed
Special Bootstrap
Special Test
0 = Logic Low
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參數(shù)描述
MC68HCP11A1FN 制造商:MOTORALA 功能描述:
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MC68HCP11E0FN 功能描述:MICROCONTROLLER MCU 8ADC 3MHC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
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