UPD8039L - NEC

UPD8039L HIGH PERFORMANCE SINGLE CHIP 8-BIT MICROCOMPUTERS

The NEC /.IPDS049 and /.IPDS039L are single chip 8-bit microcomputers. The processors differ only in their internal program memory options: the /.IPDS049 has 2K x S bytes of mask ROM and the /.IPDS039L has external program memory. Both of these devices feature new, high performance 11 MHz operation. F EATU R ES • High Performance 11 MHz Operation • Full',.

Features

of the pPDS049 except the 204S x S-bit internal ROM. The external program memory can be implemented using standard SOSOA/SOS5A memory products. POWER (UPPL Y I IVDD PROGRAM SUPPLY Ivcc
·w flOW POWER STANDBYI BLOCK DIAGRAM EXPANSION TO ADDITIONAL EXTERNAL MEMORY AND' 0 CONTROL AIIIO TIMING INTERRUPT PAOMIEXPANOER STROBE 358 ADDRESS PROORAM SINGLE READ WRITE MEMORY STEP STROBES STROBEl ENABLE CYCLE Aee ACCStT TEST AND PORT 1 REGISTER 1 REGISTER 2 REGISTER 3 REGISTER 6 REGISTER 7 8-LEVELSTACK IVARIABLE WORD LENGTH) PTIONAl SECOND EGISTEA BANK RESIDENT DATA MEMORY (128 x 81 PIN IDENTI.