Intel 8XC196NP, 80C196NU manual Addrmsk Address Reset State, Register Address Reset Value

8XC196NP, 80C196NU USER’S MANUAL

ADDRMSKx	Address:	Table 13-5
x = 0–5	Reset State:

The address mask (ADDRMSKx) register, together with the address compare register, defines the address range that is assigned to the chip-select x output, CSx#. The address mask register determines the size of the address range, which must be 2n bytes, where n = 8, 9, . . , 20. For a 2n- byte address range, calculate n1 = 20 – n, and set the n1 most-significant bits of MASK19:8 in the address mask register.

15

— — — —

7

MASK15 MASK14 MASK13 MASK12

8

MASK19 MASK18 MASK17 MASK16

0

MASK11 MASK10 MASK9 MASK8

Bit	Bit	Function
Number	Mnemonic
15:12	—	Reserved; for compatibility with future devices, write zeros to these bits.
11:0	MASK19:8	Address Mask Bits
		For a 2n-byte address range, set the n most-significant bits of
		1
		MASK19:8, where n1 = 20 – n.

Figure 13-3. Address Mask (ADDRMSKx) Register

Table 13-5. ADDRMSKx Addresses and Reset Values

Register	Address	Reset Value
ADDRMSK0	1F42H	XFFFH
ADDRMSK1	1F4AH	XFFFH
ADDRMSK2	1F52H	XFFFH
ADDRMSK3	1F5AH	XFFFH
ADDRMSK4	1F62H	XFFFH
ADDRMSK5	1F6AH	XFFFH

13-8