May 16, 2005 cellram_04_A0
1.8V 128Mb CellularRAM Type 2
157
Advance
Information
1RWH 7KH &/. DQG $'9 LQSXWV FDQ EH WLHG WR 966 LI WKH GHYLFH LVDOZD\V RSHUDWLQJ LQ DV\QFKURQRXV RU SDJH PRGH :DLW
LV DVVHUWHG EXW VKRXOGEH LJQRUHG GXULQJDV\QFKURQRXVDQG SDJH PRGH RSHUDWLRQV
Table 25.1
Signal Descriptions
Symbol
Type
Description
$>@
,QSXW
$GGUHVV,QSXWV ,QSXWVIRU DGGUHVVHVGXULQJ 5HDG DQG:ULWH RSHUDWLRQV $GGUHVVHVDUH
LQWHUQDOO\ ODWFKHG GXULQJ 5HDG DQG :ULWH F\FOHV 7KH DGGUHVV OLQHV DUH DOVR XVHG WR GHILQH WKH
YDOXHWREHORDGHG LQWR WKH%&5RU WKH5&5
&/.
,QSXW
&ORFN 6\QFKURQL]HVWKHPHPRU\WR WKHV\VWHPRSHUDWLQJIUHTXHQF\GXULQJ V\QFKURQRXV
RSHUDWLRQV :KHQ FRQILJXUHG IRUV\QFKURQRXVRSHUDWLRQ WKHDGGUHVVLV ODWFKHG RQWKHILUVW
ULVLQJ &/. HGJH ZKHQ $'9 LV DFWLYH &/. LV VWDWLF +LJK RU /RZ GXULQJ DV\QFKURQRXV DFFHVV
5HDGDQG :ULWH RSHUDWLRQVDQG GXULQJ3DJH5HDG$FFHVVRSHUDWLRQV
$'9
,QSXW
$GGUHVV9DOLG ,QGLFDWHVWKDW DYDOLGDGGUHVVLVSUHVHQWRQWKH DGGUHVVLQSXWV $GGUHVVHV
FDQ EH ODWFKHG RQ WKH ULVLQJ HGJH RI $'9 GXULQJ DV\QFKURQRXV 5HDG DQG :ULWH RSHUDWLRQV
$'9FDQ EHKHOG /RZGXULQJ DV\QFKURQRXV5HDGDQG:ULWH RSHUDWLRQV
&5(
,QSXW
&RQILJXUDWLRQ 5HJLVWHU (QDEOH :KHQ &5(LV +LJK :ULWH RSHUDWLRQV ORDG WKH 5&5 RU %&5
&(
,QSXW
&KLS (QDEOH $FWLYDWHV WKH GHYLFH ZKHQ /RZ :KHQ &( LV +LJK WKH GHYLFH LV GLVDEOHG DQG
JRHV LQWR VWDQGE\ RU GHHS SRZHUGRZQ PRGH
2(
,QSXW
2XWSXW (QDEOH (QDEOHV WKH RXWSXW EXIIHUV ZKHQ /RZ :KHQ 2( LV +LJK WKH RXWSXW EXIIHUV
DUHGLVDEOHG
:(
,QSXW
:ULWH (QDEOH 'HWHUPLQHV LI D JLYHQ F\FOH LV D :ULWH F\FOH ,I :( LV /RZ WKH F\FOH LV D :ULWH
WR HLWKHU DFRQILJXUDWLRQUHJLVWHURU WRWKHPHPRU\DUUD\
/%
,QSXW
/RZHU%\WH(QDEOH '4>@
8%
,QSXW
8SSHU%\WH(QDEOH '4>@
'4>@
,QSXW2XWSXW 'DWD,QSXWV2XWSXWV
:DLW
2XWSXW
:DLW 3URYLGHVGDWDYDOLGIHHGEDFNGXULQJEXUVW5HDGDQG:ULWHRSHUDWLRQV7KH VLJQDO LV
JDWHG E\ &( :DLW LV XVHG WR DUELWUDWH FROOLVLRQV EHWZHHQ UHIUHVK DQG 5HDG:ULWH RSHUDWLRQV
:DLWLVDVVHUWHGZKHQDEXUVW FURVVHVDURZERXQGDU\ :DLWLV DOVRXVHGWRPDVNWKH GHOD\
DVVRFLDWHG ZLWK RSHQLQJ D QHZ LQWHUQDO SDJH :DLW LV DVVHUWHG DQG VKRXOG EH LJQRUHG GXULQJ
DV\QFKURQRXVDQG SDJHPRGH RSHUDWLRQV :DLWLV+LJK= ZKHQ&( LV+LJK
9&&
6XSSO\
'HYLFH3RZHU 6XSSO\ 9±9 3RZHUVXSSO\IRUGHYLFHFRUHRSHUDWLRQ
9&&4
6XSSO\
,23RZHU 6XSSO\ 9±93RZHUVXSSO\IRULQSXWRXWSXW EXIIHUV
966
6XSSO\
966 PXVWEHFRQQHFWHG WRJURXQG
9664
6XSSO\
9664 PXVWEH FRQQHFWHG WRJURXQG