Intel 8XC196NP, Microcontroller manual XC196NP and 80C196NU Special-purpose Memory Addresses

8XC196NP, 80C196NU USER’S MANUAL

5.2.2.2Special-purpose Memory

Special-purpose memory resides in locations FF2000–FF207FH. It contains several reserved memory locations, the chip configuration bytes (CCBs), and vectors for both peripheral transac- tion server (PTS) and standard interrupts. Note that the special-purpose memory partition of the 80C196NU differs slightly from that of the 8XC196NP. Table 5-3 describes the special-purpose memory; bold type highlights the differences.

Table 5-3. 8XC196NP and 80C196NU Special-purpose Memory Addresses

8XC196NP	80C196NU
Address	Address	Description
(Hex)	(Hex)
FF207F	FF207F	Reserved (each byte must contain FFH)
FF205E	FF2060
FF205D	FF205F	PTS vectors
FF2040	FF2040
FF203F	FF203F	Upper interrupt vectors
FF2030	FF2030
FF202F	FF202F	Reserved (each byte must contain FFH)
FF201B	FF201B
FF201A	FF201A	CCB1
FF2019	FF2019	Reserved (must contain 20H)
FF2018	FF2018	CCB0
FF2017	FF2017	Reserved (each byte must contain FFH)
FF2014	FF2010
FF2013	FF200F	Lower interrupt vectors
FF2000	FF2000

—80C196NP and 80C196NU: This partition is in external memory (external addresses F2000–F207FH).

—83C196NP: The REMAP bit (CCB1.2), the EA# input, and the type of instruction (extended or nonextended) control access to this partition, as shown in Table 5-4.

Table 5-4. Special-purpose Memory Access for the 83C196NP

REMAP	EA# Pin	Instruction	Memory Location Accessed
(CCB1.2)		Type
X	Asserted	Extended or nonextended	External memory, F2000–F207FH
0	Deasserted	Extended or nonextended	Internal ROM, FF2000–FF207FH
1	Deasserted	Extended	Internal ROM, FF2000–FF207FH
		Nonextended	External memory, 02000–0207FH

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