Chapter 27 Mask Options - NEC 78K0 User Manual

Mask ROM versions are provided with the following mask options.
1. Power-on-clear (POC) circuit
• POC cannot be used
• POC used (detection voltage: V
• POC used (detection voltage: V
2. Ring-OSC
• Cannot be stopped
• Can be stopped by software
3. Pull-up resistor of P60 to P63 pins
• Pull-up resistor can be incorporated in 1-bit units
(Pull-up resistors are not available for the flash memory versions.)
Note (A1) and (A2) grade products cannot be selected because their supply voltage V
Flash memory versions that support the mask options of the mask ROM versions are as follows.
Table 27-1. Flash Memory Versions Supporting Mask Options of Mask ROM Versions
POC Circuit
POC cannot be used
POC used
= 2.85 V ±0.15 V)
(V
POC
POC used
= 3.5 V ±0.2 V)
(V
POC
494

CHAPTER 27 MASK OPTIONS

= 2.85 V ±0.15 V)
POC
= 3.5 V ±0.2 V)
POC
Mask Option
Ring-OSC
Cannot be stopped
Can be stopped by software
Cannot be stopped
Can be stopped by software
Cannot be stopped
Can be stopped by software
User's Manual U15947EJ2V0UD
Note
Flash Memory Version
*
µ
PD78F0148M1, 78F0148M1(A), 78F0148M1(A1)
µ
PD78F0148M2, 78F0148M2(A), 78F0148M2(A1)
µ
PD78F0148M3, 78F0148M3(A)
µ
PD78F0148M4, 78F0148M4(A)
µ
PD78F0148M5, 78F0148M5(A), 78F0148M5(A1)
µ
PD78F0148M6, 78F0148M6(A), 78F0148M6(A1)
is 3.3 to 5.5 V.
DD