參數(shù)資料
型號(hào): MC68HC11K1
廠商: Motorola, Inc.
元件分類: 8位微控制器
英文描述: 8-Bit Microcontroller(8位微控制器)
中文描述: 8位微控制器(8位微控制器)
文件頁數(shù): 4/20頁
文件大?。?/td> 286K
代理商: MC68HC11K1
MOTOROLA
4
AN1242/D
Figure 2 Next Generation MC68HC711K4 Application With Keyboard and LCD
To complicate matters further, these changes make greater demands of the MCU firmware. As shown in
Figure 3
, application control code and constant tables fit neatly into the 24 Kbytes of EPROM on the
MC68HC711K4. The ASCII terminal connection to the SCI reduces the user interface to simple character
I/O functions, but addition of a parallel input keyboard and a large LCD panel requires supplemental firm-
ware support that increases permanent storage requirements to more than 24 Kbytes.
6 ROW X 16 COLUMN
KEYBOARD
MC68HC711K4
VDD
VSS
AVDD
VRH
PE7/AN7
PE6/AN6
PE5/AN5
PE4/AN4
PE3/AN3
PE2/AN2
PE1/AN1
PE0/AN0
VRL
AVSS
VDD
VSS
VSS
AN1242 SCHEM 2
PA7/PAI/OC1
PA6/OC2/OC1
PA5/OC3/OC1
PA5/OC3/OC1
PA4/OC4/OC1
PA3/IC4/OC5/OC1
PA2/IC1
PA1/IC2
PA0/IC3
TEST[16:14]
P
P
P
P
P
P
P
P
V
V
X
I
P
P
P
P
P
P
P
P
PB7/ADDR15
PB6/ADDR14
PB5/ADDR13
PB4/ADDR12
PB3/ADDR11
PB2/ADDR10
PB1/ADDR9
PB0/ADDR8
VDD
VSS
PF7/ADDR7
PF6/ADDR6
PF5/ADDR5
PF4/ADDR4
PF3/ADDR3
PF2/ADDR2
PF1/ADDR1
PF0/ADDR0
MODB/VSTBY
MODA/LIR
RESET
P
P
P
P
P
P
E
X
X
E
V
V
P
P
P
P
P
P
P
P
VDD
VSS
VDD
ANALOG INPUTS
PULSE-ACTUATED OUTPUTS
EDGE-TRIGGERED INPUTS
PULSE ACCUMULATOR INPUT
R
VDD
VSS
COLUMNS
VDD
MC34(0/1)64P5
OR EQUIVALENT
RESET SUPERVISOR
VSS
SPI-COMPATIBLE
LCD PANEL
VSS
P
VDD
VSS
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