Intel MCS 51 User Manual

i~.
83C152 HARDWARE DESCRIPTION
Posmo%
—7 6 5 4 3 2 1 0
RE~EPT~10N
POLL\
S~NDl$JG
SEQUENCE ‘NAL SEi2UEfi CE
o
270427-15
lECEPTIONSEQUENCE- Thesequenceexpectedin the SENDINGSEQUENCEportionofthe controlbyte
nthenextreeeivedframe.This also
confirmsrmrrectrqtion ofupto sevenframesprior to the aequeneegiven.
?OLL/FINAL- Identifiesthe frameas beinga pollingrequestfromthe masterstationor the last in a serieaof
ktrnezfromthe
masteror aeeondary.
~ENDINGSEQUENCE- Identifiesthe sequeneeof the frame beingtransmitted.
) - If bit O= Othe frame is identifiedas a informationalformat type.
INFORMATION FORMAT
-------------------------------------------------------
El?
POSMONS
—7 6 5 4 3 2 1 0
RE~EPT;10 N
POLL/
~ (j~E
/
SEQUENCE ‘lNM i
0,1
270427-16
RECEPTIONSEQUENCE- Expectedsequeneeofframe for next reception.
POLL/FINAL- Identitiesframe as being a pollingrequest from the master station or the last in a series of
h-armsfrom the master or seeondary.
MODE- Identifieswhetherreceiveris ready (00),notready(10)or a framewasrejected(01).The rejectedframe
[Sidentitkd by the reeeptionsequence.
2,1- If bits 1,0 = 0,1the frame is identifiedas a supervisoryformattype.
SUPERVISORY FORMAT
,-------------------------------------------------------
BIT
POSMONS
—-7 6 5 4 3 2 1 0
C~MMA$D/ IWLL/ COMtiAND/ /
R@ PO~SE 11
FINAL
RESP@NSE
:
270427-17
COMMAND/RESPONSE- Identifks the typeof emmand or response.
POLL/FINAL - Identifiesframe as being a pollingrequest from the master station or the last in a seriesof
framesfromthe master or seeondary.
1,1- If bits 1,0 = 1,1the frame is identifiedas an unnumberedformat type.
NONSEQUENCED FORMAT
270427-18
Figure 3.7. SDLC Control Field
7-29

Intel MCS 51 Specifications

General

Brand	Intel
Model	MCS 51
Category	Microcontrollers
Language	English