參數(shù)資料
型號： MCHC11F1CFNE5
廠商： Freescale Semiconductor
文件頁數(shù)： 75/158頁
文件大?。?/td> 0K
描述： MCU 8BIT 1KRAM 512EE 68-PLCC
標(biāo)準(zhǔn)包裝： 18
系列： HC11
核心處理器： HC11
芯體尺寸： 8-位
速度： 5MHz
連通性： SCI，SPI
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 30
程序存儲器類型： ROMless
EEPROM 大小： 512 x 8
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
PIN DESCRIPTIONS
TECHNICAL DATA
2-9
OR mode, (PORTD bits are at logic level zero), pins are actively driven low by the N-
channel driver. When a port D bit is at logic level one, the associated pin is in a high-
impedance state, as neither the N-channel nor the P-channel devices are active. It is
customary to have an external pull-up resistor on lines that are driven by open-drain
devices. Port D can be configured for wired-OR operation in any operating mode.
2.11.5 Port E
Port E is an 8-bit input-only port that is also used as the analog input port for the ana-
log-to-digital converter. Port E pins that are not used for the A/D system can be used
as general-purpose inputs. However, PORTE should not be read during the sample
portion of an A/D conversion sequence.
2.11.6 Port F
Port F is an 8-bit output-only port. In single-chip mode, port F pins are general-purpose
output pins (PF[7:0]). In expanded mode, port F pins act as the low-order address out-
puts (ADDR[7:0]).
PORTF can be read at any time. Reads of PORTF return the pin driver input level. If
PORTF is written, the data is stored in internal latches. It drives the pins only in single-
chip or bootstrap mode. In expanded operating modes, port F pins are the low-order
address outputs (ADDR[7:0]).
2.11.7 Port G
Port G is an 8-bit general-purpose I/O port. When enabled, four chip select signals are
alternate functions of port G bits [7:4].
PORTG can be read at any time. Inputs return the pin level; outputs return the pin driv-
er input level. If PORTG is written, the data is stored in internal latches. It drives the
pins only if they are configured as outputs.
The GWOM control bit in the OPT2 register disables port G's P-channel output drivers.
Because the N-channel driver is not affected by GWOM, setting GWOM causes port
G to become an open-drain-type output port suitable for wired-OR operation. In wired-
OR mode, (PORTG bits are at logic level zero), pins are actively driven low by the N-
channel driver. When a port G bit is at logic level one, the associated pin is in a high-
impedance state, as neither the N-channel nor the P-channel devices are active. It is
customary to have an external pull-up resistor on lines that are driven by open-drain
devices. Port G can be configured for wired-OR operation in any operating mode.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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