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Description
3-2
3.1 Description
The MSC1210 is a flexible microcontroller with a relatively large number of
modes of operation. Your program may inspect and/or change the operating
mode of the MSC1210 by manipulating the values of its SFRs.
SFRs are accessed as if they were normal internal RAM. The only difference
is that internal RAM is addressed in direct mode with addresses 00
H
through
7F
H
, whereas SFR registers are accessed in the range of 80
H
through FF
H
.
Each SFR has an address (80
H
−FF
H
) and a name. Table 3−1 provides a
graphical presentation of the 8052’s SFRs, their names, and their address.
Although the address range of 80
H
through FF
H
offers 128 possible address-
es, there are 24 addresses that are not assigned to an SFR, as shown in
Table 3−1.
Note:
Reading an unassigned SFR will get 00
H
, and writing to an unassigned SFR
is ignored.
Table 3−1.SFR Names and Addresses.
80 P0 SP DPL0 DPH0 DPL1 DPH1 DPS PCON 87
88 TCON TMOD TL0 TL1 TH0 TH1 CKCON MWS 8F
90 P1 EXIF MPAGE CADDR CDATA MCON 97
98 SCON0 SBUF0 SPICON SPIDATA SPIRCON SPITCON SPISTART SPIEND 9F
A0 P2 PWMCON PWMLOW PWMHI PAI AIE AISTAT A7
A8 IE BPCON BPL BPH P0DDRL P0DDRH P1DDRL P1DDRH AF
B0 P3 P2DDRL P2DDRH P3DDRL P3DDRH B7
B8 IP BF
C0 SCON1 SBUF1 EWU C7
C8 T2CON RCAP2L RCAP2H TL2 TH2 CF
D0 PSW OCL OCM OCH GCL GCM GCH ADMUX D7
D8 EICON ADRESL ADRESM ADRESH ADCON0 ADCON1 ADCON2 ADCON3 DF
E0 ACC SSCON SUMR0 SUMR1 SUMR2 SUMR3 ODAC LVDCON E7
E8 EIE HWPC0 HWPC1 HDWVER Reserved Reserved FMCON FTCON EF
F0 B PDCON PASEL ACLK SRST F7
F8 EIP SECINT MSINT USEC MSECL MSECH HMSEC WDTCON FF