
MB89530A Series
3
■
PRODUCT LINEUP
Part number
(Continued)
Parameter
MB89535A
MB89537A/
537AC
MB89538A/
538AC
MB89F538
MB89P538
MB89PV530
Type
Mass produced (MASK ROM)
Flash product
One-time
programmable
product
48 Kbytes
×
8-bit
(built-in ROM)
(write from
general purpose
EPROM writer)
Evaluation
product
ROM capacity
16 Kbytes
×
8-bit
(built-in
ROM)
32 Kbytes
×
8-bit
(built-in
ROM)
48 Kbytes
×
8-bit
(built-in
ROM)
48 Kbytes
×
8-bit
(built-in Flash)
(write from
general purpose
EPROM writer)
48 Kbytes
×
8-bit
(external ROM) *
2
RAM capacity
512 bytes
×
8-bit
1 Kbyte
×
8-bit
2 Kbytes
×
8-bit
Operating
voltage
2.2 V to 5.5 V *
1
(MB89535A/537A/538A/537AC/538AC)
3.5 V to 5.5 V
2.7 V to 5.5 V
2.7 V
to
5.5 V
CPU functions
Basic instructions
Instruction bit length
Instruction length
Data bit length
Minimum instruction execution time : 0.32
μ
s
/
12.5 MHz
Minimum interrupt processing time : 2.88
μ
s
/
12.5 MHz
Input ports
: single-clock system : 5 (4 also usable as external interrupts)
dual-clock system
Output-only ports (N-ch open drain)
: 8 (8 also usable as A/D converter input)
I/O ports (N-ch open drain) : 2 (2 also usable as SO2/SDA or SI2/SCL)
I/O ports (CMOS) (Except MB89F538)
: 38
I/O ports (CMOS) (MB89F538)
: 37 (21 have no other function)
Total (except MB89F538) : single-clock system : 53
dual-clock system
Total (MB89F538)
: single-clock system : 52
dual-clock system
: 136
: 8 bits
: 1 bit to 3 bits
: 1, 8, 16 bits
Ports
: 3 (3 also usable as external interrupts)
: 51
: 50
Time base
timer
21 bits
Interrupt periods at main clock oscillation frequency of 12.5 MHz
(approx. 0.655 ms, 2.621 ms, 20.97 ms, 335.5 ms)
Watchdog
timer
Reset period of approx. 167.8 ms to 335.6 ms at main clock frequency of 12.5 MHz
Reset period of approx. 500 ms to 1000 ms at sub clock frequency of 32.768 kHz.
PWM timer
8-bit interval timer operation
(supports square wave output, operating clock period : 1, 8, 16, 64 t
inst
*
3
)
Pulse width measurement with 8-bit resolution (conversion period : 2
8
t
inst
*
3
to 2
8
×
64 t
inst
*
3
)
2 channels (can also be used as interval timer, can also be used as ch.1 output and ch.2 count
clock)
Watch prescaler
Interval times at 17-bit sub clock base frequency of 32.768 kHz
(approx. 31.25 ms, 0.25 s, 0.50 s, 1.00 s, 2.00 s, 4.00 s)
P