BU24591 Datasheet, PDF (3/8 Pages) Rohm – 4bit 1chip micro-controller for CD-DA

Optical ICs
!Pin assignment
OSC1 49
OSC2 50
VDD 51
ADC0 52
ADC1 53
ADC2 54
ADC3 55
ADC4 56
ADC5 57
ADC6 58
ADC7 59
TEST 60
COM0 61
COM1 62
COM2 63
COM3 64
BU24591
BU24591
32 PWC
31 P13
30 P12
29 P11
28 P10
27 P03
26 P02
25 P01
24 P00
23 SCK0
22 SIO0
21 SIN0
20 SEG19
19 SEG18
18 SEG17
17 SEG16
!Pin descriptions
Pin No.
Pin name
24 to 27
28 to 31
35 to 38
P00 to P03
P10 to P13
P20 to P23
(PI011A block)
43 to 46
W0 to W3
(STP04A block)
I/O
Function
• 4-bit input or output.
• Input/Output is specified in a bit by program.
(Output is Nch open drain type.)
I / O _{• Pull-up resistor can be turned ON/OFF in a bit by program.}
• Upon resetting, input is specified, and the pull-up resistance
is turned OFF. ∗1
Type
D
• General 4-bit input.
• It can be used as stop cancellation input and interrupt request
signal input by program. (It can be specified in a bit)
I
• Pull-up resistor can be turned ON/OFF in a bit by program.
C
• Upon resetting, the pull-up resistor is turned OFF.
42
BIN
(BIX03A block)
• General 1-bit input.
• It can be used as stop cancellation input and interrupt request
I
signal input by program.
C
• Pull-up resistor can be turned ON/OFF by program.
• Upon resetting, the pull-up resistor is turned OFF.
∗1 Immediately after resetting, terminal is in high impedance state. Therefore, termination may be required in some applications.
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