HD6433713 datasheet(119/324 Pages) RENESAS

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Table 7-3 shows the mask options with mask ROM versions. A mask ROM version is compatible

with a ZTAT™ version only when C and D options are selected for all pins.

Table 7-3 Correspondence between Mask ROM and ZTAT™ Versions

Type

BCDE

Mask ROM

Option

ZTAT

™

—

Fixed

—

Notes

1. When circuit type E, “with MOS pull-down,” is chosen, the source of the MOS pull-down is

connected to the Vdisp power supply. Accordingly, the mask option making pin P17/Vdisp a Vdisp

power supply pin must also be chosen.

2. Type C, “no MOS pull-up,” is the only option available for port 0.

7.1.2 MOS Pull-Up

Ports 1* and 9, which are standard input/output ports, can be designated by mask options as

having or not having MOS pull-up transistors for their (CMOS) outputs. (This does not apply to

ZTAT™ versions.)

Figure 7-1 shows the MOS pull-up circuit configuration.

When “with MOS pull-up” is selected by mask option, the MOS pull-up will normally be on,

regardless of the port data register (PDR) and port control register (PCR) settings.

(See table 7-4.)

Note: * Pin P17/Vdisp is a high-voltage pin, so the MOS pull-up option cannot be selected for

this pin.

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