参数资料
型号: M38B79FFFP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 4.2 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100
文件页数: 54/112页
文件大小: 1862K
代理商: M38B79FFFP
38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
43
FLD CONTROLLER
The M38B7 group has fluorescent display (FLD) drive and control
circuits.
Table 9 shows the FLD controller specifications.
Specifications
52 pins (20 pins can be switched to general-purpose ports)
4 pins (all 4 pins can be switched to general-purpose ports)
(A driver IC must be installed externally)
Used FLD output
28 segment 28 digit (segment number + digit number
≤ 56)
Used digit output
40 segment 16 digit (segment number
≤ 40, digit number ≤ 16)
Connected to M35501
56 segment (connected number of M35501) digit
(segment number
≤ 56, digit number ≤ number of M35501 16)
Used P64 to P67 expansion
52 segment 16 digit (segment number
≤ 52, digit number ≤ 16)
4.0
s to 1024 s (count source XIN/16, 4 MHz)
16.0
s to 4096 s (count source XIN/64, 4 MHz)
4.0
s to 1024 s (count source XIN/16, 4 MHz)
16.0
s to 4096 s (count source XIN/64, 4 MHz)
Digit interrupt
FLD blanking interrupt
Key-scan using digit
Key-scan using segment
Digit pulse output function
This function automatically outputs digit pulses.
M35501 connection function
The number of digits can be increased easily by using the output of DIMOUT(P73) as CLK for the
M35501.
Toff section generating/nothing function
This function does not generate Toff1 section when the connected outputs are the same.
Gradation display function
This function allows each segment to be set for dark or bright display.
P64 to P67 expansion function
This function provides 16 lines of digit outputs from four ports by attaching the decoder converting
4-bit data to 16-bit data.
Item
FLD
controller
port
High-breakdown-
voltage output port
CMOS port
Display pixel number
Period
Dimmer time
Interrupt
Key-scan
Expanded function
Table 9 FLD controller specifications
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