BU24591
BU24591 is 4bit 1chip micro-controller for CD-DA manufactured by ROHM.
Features
1) Low voltage, high-speed operation (VDD=2.3 to 3.6V at 4.4MHz) 2) Built-in 8bit 8-channel AD converter 3) Built-in pulse width counter 4) Built-in two lines of SIO 5) Built-in LCD controller driver with 20 segments, 4 mon (With 3 mon available) 6) All segment output of LCD controller driver can be switched into CMOS output by the program.
!Absolute maximum ratings (Ta=25°C)
Parameter Applied voltage Power dissipation Operating temperature range Storage temperature range Symbol VDD Pd Topr Tstg Limits
- 0.3 to +4.5 500 ∗
- 25 to +75
- 55 to +125 Unit V m W °C °C
∗ Reduced by 5m W for each increase in Ta of 1°C over 25°C.
!Remended operating conditions (Ta=25°C)
Parameter Power supply voltage Input "H" voltage Input "L" voltage Symbol VDD VIHS VILS Min. 2.3 0.75VDD 0 Typ.
- -
- Max. 3.6 VDD 0.15VDD Unit V V V
1/7
Optical ICs
!Block diagram
OSC1
OSC2
OSC03A
PWC01A
TMR03B
SYSTEM CLK
T0,T1
CPU02A
Acc
IRQ STP
STP04A
W0∼W3
FLAG
CLOCK GEN
FLAG STK
IRQ STP
BIX03A
RESET...
