uPD789074 Subseries 8-Bit Single-Chip Microcontrollers UD - Home

CHAPTER 13 µPD78F9076The µPD78F9076 replaces the internal ROM of the µPD789071, 789072, 789074, 789071(A), 789072(A), and789074(A), with flash memory. The differences between the flash memory and the mask ROM versions are shownin Table 13-1.Table 13-1. Differences Between Flash Memory and Mask ROM VersionsItemFlash MemoryVersionMask ROM VersionµPD78F9076µPD789071µPD789071(A)µPD789072µPD789072(A)µPD789074µPD789074(A)Internal memoryROM structure Flash memory Mask ROMROM capacity 16 KB 2 KB 4 KB 8 KBHigh-speed RAM256 bytesVPP pin Provided Not providedElectrical characteristicsRefer to CHAPTER 15 ELECTRICAL SPECIFICATIONS (EXPANDED-SPECIFICATION PRODUCTS) and CHAPTER 16 ELECTRICALSPECIFICATIONS (CONVENTIONAL PRODUCTS).Caution There are differences in the noise immunity and noise radiation between flash memory andmask ROM versions. When pre-producing an application set with the flash memory version andthe mass producing it with the mask ROM version, be sure to conduct sufficient evaluations onthe commercial sample (CS), not engineering sample (ES), of the mask ROM version.174User’s Manual U14801EJ3V1UD