User’s Manual
C166S V1 SubSystem
The External Bus Interface
User’s Manual
8-29
V 1.6, 2001-08
Priority 1: The XADRSx registers are evaluated first. A match with one of these
registers directs the access to the respective X-Peripheral using the corresponding
XBCONx register and ignoring all other ADDRSELx registers. Priority of the XADRSx
registers: XADR1 (priority I.1) , XADRS2 (I.2), XADRS3 (I.3), XADR4 (I.4) , XADRS5
(I.5), XADRS6 (I.6)
Priority 2: A match with one of the registers ADDRSELx directs the access to the
respective external area using the corresponding BUSCONx register.
Priority of the ADDRSELx registers: ADDRSEL2 (priority II.1), ADDRSEL4 (II.2),
ADDRSEL1 (II.3), ADDRSEL3 (II.4)
Priority 3: If there is no match with any XADRSx or ADDRSELx register, the access to
the external bus uses BUSCON0.
Figure 8-10
Address Window Arbitration Example
Note: RP0H cannot be changed directly via software, but rather allows the current
configuration to be checked.
Bitfields CLKCFG, SALSEL, and CSSEL may be reconfigured via register
RSTCON.
RP0H
Reset Value of P0H
SFR (F108
H
/84
H
)
Reset value: - - XX
H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CLKCFG
SALSEL
CSSEL
WRC
rh
rh
rh
rh
Active Window
Inactive Window
BUSCON0
BUSCON1
BUSCON2
XBCON1
BUSCON3
BUSCON4
XBCON6
XBCON...
Содержание C166S V1 SubSystem
Страница 10: ...User s Manual C166S V1 SubSystem User s Manual I 6 V 1 6 2001 08...
Страница 16: ...User s Manual C166S V1 SubSystem Introduction User s Manual 1 6 V 1 6 2001 08...
Страница 126: ...User s Manual C166S V1 SubSystem Central Processing Unit User s Manual 3 96 V 1 6 2001 08...
Страница 178: ...User s Manual C166S V1 SubSystem Memory Organization User s Manual 4 52 V 1 6 2001 08...
Страница 206: ...User s Manual C166S V1 SubSystem Instruction Set User s Manual 5 28 V 1 6 2001 08...
Страница 306: ...User s Manual C166S V1 SubSystem Detailed Instruction Set User s Manual 6 100 V 1 6 2001 08...
Страница 362: ...User s Manual C166S V1 SubSystem The External Bus Interface User s Manual 8 40 V 1 6 2001 08...
Страница 452: ...User s Manual C166S V1 SubSystem General Purpose Timer Unit User s Manual 12 44 V 1 6 2001 08...
Страница 454: ...User s Manual C166S V1 SubSystem Instruction Index User s Manual 13 2 V 1 6 2001 08...
Страница 459: ......