UPD17073 NEC, UPD17073 Datasheet - Page 46

• Manufacturer Part Number: UPD17073
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM
• Manufacturer: NEC

8.2 Configuration and Function of Peripheral Control Registers
50H through 6FH of BANK1.
only (R), write-only (W), and read-and-reset (R&Reset) registers.
these bits.
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Caution Bit 3 of address 50H of BANK1 (bit 3 of the LCD driver display start register) is allocated to a test
Figure 8-2 shows the configuration of the peripheral control registers.
Table 8-1 lists the peripheral hardware control functions of the peripheral control registers.
As shown in Figure 8-2, the peripheral control registers consist of a total of 32 nibbles (32
Each peripheral control register has an attribute of 1 nibble, and is classified into four types: read/write (R/W), read-
Nothing is changed even if data is written to the read only (R and R&Reset) registers.
If a write-only (W) register is read, the value is undefined.
Of the 4-bit data of 1 nibble, the bits fixed to “0” are always “0” when read, and also “0” when data is written to
mode area. Therefore, do not write “1” to this bit.
4 bits) of addresses
PD17072,17073