mb91101 Fujitsu Microelectronics, Inc., mb91101 Datasheet - Page 15

• Manufacturer Part Number: mb91101
• Description: 32-bit Risc Microcontroller Cmos
• Manufacturer: Fujitsu Microelectronics, Inc.

1. Preventing Latchup
2. Treatment of Unused Pins
3. External Reset Input
4. Remarks for External Clock Operation
5. Power Supply Pins
HANDLING DEVICES
In CMOS ICs, applying voltage higher than V
rating across V
This phenomenon rapidly increases the power supply current, which may result in thermal breakdown of the
device. Make sure to prevent the voltage from exceeding the maximum rating.
Take care that the analog power supply (AV
supply (V
Unused pins left open may cause malfunctions. Make sure to connect them to pull-up or pull-down resistors.
It takes at least 5 machine cycle to input “L” level to the RST pin and to ensure inner reset operation properly.
When external clock is selected, supply it to X0 pin generally, and simultaneously the opposite phase clock to
X0 must be supplied to X1 pin. However, in this case the stop mode must not be used (because X1 pin stops at
“H” output in stop mode).
And it can be used to supply only to X0 pin with 5 V power supply at 12.5 MHz and less than.
When there are several V
the device, minimizing the risk of malfunctions such as latch up. To further reduce the risk of malfunctions, to
prevent EMI radiation, to prevent strobe signal malfunction resulting from creeping-up of ground level and to
observe the total output current standard, connect all V
It is preferred to connect V
possible.
It is also recommended to connect a ceramic capacitor as a bypass capacitor of about 0.1 F between V
V
• Using an external clock
SS
at a position as close as possible to the MB91101 and MB91101A.
CC
) when the analog power supply turned on or off.
CC
and V
SS
CC
may cause latchup.
CC
and V
Using an external clock (can be used at 12.5 MHz and less than.)
and V
Note: Stop mode (oscillation stop mode) can not be used.
SS
SS
pins, each of them is equipotentially connected to its counterpart inside of
of the MB91101and MB91101A to power supply with minimal impedance
Using an external clock (normal)
CC
Open
(5 V power supply only)
CC
, AVRH) and the analog input do not exceed the digital power
or lower than V
CC
and V
X0
X1
X0
X1
SS
SS
MB91101/MB91101A
MB91101/MB91101A
MB91101/MB91101A
pins to the power supply or GND.
to input/output pin or applying voltage over
CC
and
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