(r) this line goes to the ROM only.
(s) this line is Shared between the ROM, MMC/chip, and Nintendo
(n) this line connects to the NES cart edge only, and not the ROM
(w) this line connects to the WRAM only and nowhere else
MMC6 Chip: (64 pin QFP) [Made by Kevin Horton (khorton@iquest.net)]
----------
There is one known flavour: 'MMC6B' I suspect there may be an 'A' rev. also.
48 33
| |
.---------.
49-| |-32
| |
| MMC6B |
| |
64-| |-17
\---------'
| |
1 16
Pin# Function Pin# Function
---- -------- ---- --------
1 - PRG A13 (n) 33 - R/W
2 - M2 34 - PRG D2 (s)
3 - GND 35 - PRG D3 (s)
4 - GND 36 - PRG D1 (s)
5 - GND 37 - GND
6 - NC 38 - +batt
7 - GND 39 - PRG D4 (s)
8 - +5V 40 - PRG D0 (s)
9 - +5V 41 - PRG D5 (s)
10 - +batt 42 - PRG A0 (s)
11 - GND 43 - PRG D6 (s)
12 - +5V 44 - PRG A1 (s)
13 - threshold 45 - PRG D7 (s)
14 - CHR A10 (n) 46 - PRG A2 (s)
15 - CHR A11 (n) 47 - PRG /CE (r)
16 - NC 48 - PRG A3 (s)
17 - CHR A10 (r) 49 - PRG A4 (s)
18 - CHR A16 (r) 50 - PRG A16 (r)
19 - CHR A11 (r) 51 - PRG A5 (s)
20 - CHR A12 (n) 52 - PRG A6 (s)
21 - CHR A13 (r) 53 - PRG A9 (s)
22 - CHR A12 (r) 54 - PRG A7 (s)
23 - CHR A14 (r) 55 - PRG A8 (s)
24 - GND 56 - +batt
25 - +batt 57 - GND
26 - CHR A18?(r) 58 - PRG A12 (s)
27 - CIRAM A10 (n) 59 - PRG A13 (r)
28 - CHR /RD (s) 60 - PRG A15 (r)
29 - CHR /CE (s) 61 - PRG A14 (r)
30 - CHR A17 (r) 62 - PRG A18?(r)
31 - /IRQ 63 - PRG A14 (n)
32 - PRG /CE (n) 64 - PRG A17 (r)
Notes: A10 & A11 do not go to this chip.
Threshold: Tied to a resistor divider between +5V and GND;
resistor to +5V is 180 ohms, resistor to ground is 470 ohms.