Intel 8XC196NP User Manual page 265

8XC196NP, 80C196NU USER'S MANUAL
ADDRMSK x
x = 0–5
The address mask (ADDRMSK x ) register, together with the address compare register, defines the
address range that is assigned to the chip-select x output, CS x #. The address mask register
determines the size of the address range, which must be 2
byte address range, calculate n
address mask register.
15
— —
7
MASK15 MASK14
Bit Bit
Number Mnemonic
15:12 —
11:0 MASK19:8
Figure 13-3. Address Mask (ADDRMSK x ) Register
Table 13-5. ADDRMSK x Addresses and Reset Values
13-8
= 20 – n , and set the n
1
— —
MASK13 MASK12
Reserved; for compatibility with future devices, write zeros to these bits.
Address Mask Bits
n
For a 2 -byte address range, set the n
MASK19:8, where n
Register Address
ADDRMSK0
ADDRMSK1
ADDRMSK2
ADDRMSK3
ADDRMSK4
ADDRMSK5
n
bytes, where n = 8, 9, . . , 20. For a 2
most-significant bits of MASK19:8 in the
1
MASK19 MASK18
MASK11 MASK10
Function
most-significant bits of
1
= 20 – n .
1
Reset Value
1F42H XFFFH
1F4AH XFFFH
1F52H XFFFH
1F5AH XFFFH
1F62H XFFFH
1F6AH XFFFH
Address: Table 13-5
Reset State:
n
-
8
MASK17 MASK16
0
MASK9 MASK8