MB89160/160A Series
■ DIFFERENCES AMONG PRODUCTS
1. Memory Size
Before evaluating using the piggyback product, verify its differences from the product that will actually be used.
Take particular care on the following points:
• On the MB89161/A and MB89163/A, the upper half of each register bank cannot be used.
• The stack area, etc., is set at the upper limit of the RAM.
2. Current Consumption
• In the case of the MB89PV160, add the current consumed by the EPROM which is connected to the top socket.
• When operated at low speed, the product with an OTPROM (one-time PROM) or an EPROM will consume
more current than the product with a mask ROM.
However, the current consumption in the sleep/stop modes is the same. (For more information, see section
“■ Electrical Characteristics.”)
3. Mask Options
Functions that can be selected as options and how to designate these options vary by the product.
Before using options check section “■ Mask Options.”
Take particular care on the following points:
• A pull-up resistor cannot be set for P20 to P27 on the MB89P165.
• A pull-up resistor is not selectable for P40 to P47 and P60 to P67 if they are used as LCD pins.
• Options are fixed on the MB89PV160.
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