OX16C950 rev B
OXFORD SEMICONDUCTOR LTD.
14.6 EXTERNAL 1X CLOCK MODE ................................................................................................................................................. 33
14.7 CRYSTAL OSCILLATOR CIRCUIT ............................................................................................................................................ 33
15 ADDITIONAL FEATURES ....................................................................................................................................................... 34
15.1 ADDITIONAL STATUS REGISTER ‘ASR’................................................................................................................................... 34
15.2 FIFO FILL LEVELS ‘TFL & RFL’............................................................................................................................................ 34
15.3 ADDITIONAL CONTROL REGISTER ‘ACR’................................................................................................................................ 34
15.4 TRANSMITTER TRIGGER LEVEL ‘TTL’..................................................................................................................................... 36
15.5 RECEIVER INTERRUPT. TRIGGER LEVEL ‘RTL’ ....................................................................................................................... 36
15.6 FLOW CONTROL LEVELS ‘FCL & FCH’.................................................................................................................................. 36
15.7 DEVICE IDENTIFICATION REGISTERS...................................................................................................................................... 36
15.8 CLOCK SELECT REGISTER ‘CKS’.......................................................................................................................................... 37
15.9 NINE-BIT MODE REGISTER ‘NMR’......................................................................................................................................... 37
15.10
15.11
15.12
15.13
15.14
15.15
MODEM DISABLE MASK ‘MDM’......................................................................................................................................... 38
READABLE FCR ‘RFC’ .................................................................................................................................................... 38
GOOD-DATA STATUS REGISTER ‘GDS’ .............................................................................................................................. 39
DMA STATUS REGISTER ‘DMS’ ....................................................................................................................................... 39
PORT INDEX REGISTER ‘PIX’............................................................................................................................................ 39
CLOCK ALTERATION REGISTER ‘CKA’............................................................................................................................... 39
16 OPERATING CONDITIONS..................................................................................................................................................... 40
17 DC ELECTRICAL CHARACTERISTICS.................................................................................................................................. 40
17.1 5V OPERATION.................................................................................................................................................................... 40
17.2 3V OPERATION.................................................................................................................................................................... 41
18 AC ELECTRICAL CHARACTERISTICS.................................................................................................................................. 42
18.1 5V OPERATION.................................................................................................................................................................... 42
18.2 3V OPERATION.................................................................................................................................................................... 43
19 TIMING WAVEFORMS............................................................................................................................................................. 44
20 PACKAGE INFORMATION...................................................................................................................................................... 46
21 ORDERING INFORMATION .................................................................................................................................................... 47
NOTES............................................................................................................................................................................................ 48
CONTACT DETAILS...................................................................................................................................................................... 49
Data Sheet Revision 1.2
Page 4
OXFORD [ OXFORD SEMICONDUCTOR ]
