I\'m having some trouble determining how many SFR (special function registers) a

Question

I'm having some trouble determining how many SFR (special function registers) are used in each microchip. The data i'm using shows a file map and a block diagram for each microchip. I've done some online research and found that each bank on a microchip has 128 bytes total. Is it as simple as subtracting the given GPR (general purpose register) from 128 to find the SFR? Below are the questions and the answers that I have thus far. I tried to upload the file that i'm using as a reference without any luck. Thanks for the help.

How many bytes are there in PIC16F84A and how many are for SFR and GPR?

            (A) 1K bytes total, 68 bytes for the GPR for bank_0 and bank_1, no SFR used

How many bytes are there in PIC16F88 and how many are for SFR and GPR?

            (A) 4K bytes total, 96 bytes for the GPR and 36 bytes for the SFR for Bank_0, 80 GPR and 48 SPR for Bank_1, 96 bytes for the GPR and 36 bytes for the SFR for Bank_2 and Bank_3. For all four banks that

Explanation / Answer

PIC16F84A

1K Program memory,68 bytes Data memory,15 SFRs used.

PIC16F88

4K program memory, 368 bytes data memory

PIC16F877A

8K program memory,368 bytes data memory

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