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參數(shù)資料
| 型號： | BU34381 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.4 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 211K |
| 代理商： | BU34381 |
99
Optical disc ICs
BU34381
Hardware descriptions
(1)
Operates on a single power supply (V
DD
= 2.7
5.5V)
(2)
Memory size
ROM
RAM
LCD display RAM: 20
(3)
Instruction execution time (1 cycle instruction)
1.5
μ
sec: (at 4MHz)
(4)
Subroutine nesting : 8 levels
(5)
Interrupts : 6 factors
External
Internal (time counter, serial I / O): 3 factors
(6)
ROM data table function (data table area: 12KB)
(7)
Two energy-saving modes (STOP / HALT)
(8)
Internal 20-segment LCD driver adaptable for vari-
ous types of displays
Bias
: 1 / 3
Duty settings : 1 / 3, 1 / 4 (programmable)
Internal bias resistor (3 stages, approx. 50k
)
: 12288
: 512
8 bits
4 bits
4 bits
: 3 factors
(9)
CMOS output
LCD segment output is program-switchable to
All 20 segments can be selected in 4-bit
groups
Resetting: CMOS small-current output port,
LOW polarity
(10) Internal remote control receiver (pulse width count-
er)
(11) Internal 8-channel, 8-bit A / D converter
(12) A / D input is programmable in 1-bit units as digital
input
(13) Internal 8-bit timer counter (also used as event
counter)
(14) Two internal serial input / outputs (LSB fast) that
simplify interface with external LSI chips
(15) 12 input / outputs (programmable pull-up)
(16) 5 inputs (programmable pull-up)
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