5

MB89143A/144A

s 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 MB89143A/144A, the upper half of the register bank cannot be used.

• The stack area, etc., is set at the upper limit of the RAM.

Before evaluating using the piggyback product, verify its differences from the product that will actually be used.

Take particular care on the following point:

• The A/D converter in the MB89143A/144A is an 8-bit resolution type. The MB89143A/144A contains neither

the 8-bit PWM timer nor the 12-bit MPG timer.

• In the case of the MB89PV140, 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 sleep/stop modes is the same. (For more information, see section

“s Electrical Characteristics”.)

4. Mask Options

Functions that can be selected as options and how to designate these options vary by the product. Before using

options check section “s Mask Options.”

Take particular care on the following point:

• A pull-up resistor option is not provided for the MB89PV140.