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MB89T635R Datasheet(PDF) 5 Page - Fujitsu Component Limited. |
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MB89T635R Datasheet(HTML) 5 Page - Fujitsu Component Limited. |
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5 / 59 page  MB89630R Series 5 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 MB89P637/W637, the program area starts from address 8007H but on the MB89PV630 and MB89637R starts from 8000H. • On the MB89P637/W637, addresses 8000H to 8006H comprise the option setting area, option settings can be read by reading these addresses. On the MB89PV630/MB89637R, addresses 8000H to 8006H could also be used as a program ROM. However, do not use these addresses in order to maintain compatibility of the MB89P637/W637. • The stack area, etc., is set at the upper limit of the RAM. • The external area is used. 2. Current Consumption • In the case of the MB89PV630, add the current consumed by the EPROM which 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 sections “s Electrical Characteristics” and “s Example 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 “s Mask Options.” Take particular care on the following points: • A pull-up resistor cannot be set for P50 to P53 on the MB89P637 and MB89W637. • Options are fixed on the MB89PV630, MB89T635R, and MB89T637R. 4. Differences between the MB89630 and MB89630R Series • Memory access area There are no difference between the access area of MB89635/MB89635R, and that of MB89637/MB89637R. The access area of MB89636 is different from that of the MB89636R when using in external bus mode. Address Memory area MB89636 MB89636R 0000H to 007FH I/O area I/O area 0080H to 037FH RAM area RAM area 0380H to 047FH External area Access prohibited 0480H to 7FFFH External area 8000H to 9FFFH Access prohibited A000H to FFFFH ROM area ROM area |
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