
IBM PowerPC 403GC
8
Pin Functional Descriptions
Active-low signals are shown with overbars:
DMAR0. Multiplexed signals are alphabetized under the first
(unmultiplexed) signal names on the same pins. The logic symbol on the preceding page shows all
403GC signals arranged by functional groups.
Table 4. 403GC Signal Descriptions
Signal
Name
Pin
Ball
I/O
Type
Function
A6
92
K12
I/O
Address Bus Bit 6. When the 403GC is bus master, this is an
address output from the 403GC. When the 403GC is not bus mas-
ter, this is an address input from the external bus master, to deter-
mine bank register usage.
A7
93
K11
I/O
Address Bus Bit 7. See description of A6.
A8
94
J13
I/O
Address Bus Bit 8. See description of A6.
A9
95
J14
I/O
Address Bus Bit 9. See description of A6.
A10
96
J12
I/O
Address Bus Bit 10. See description of A6.
A11
97
J11
I/O
Address Bus Bit 11. See description of A6.
A12
98
H13
O
Address Bus Bit 12. When the 403GC is bus master, this is an
address output from the 403GC.
A13
99
H14
O
Address Bus Bit 13. See description of A12.
A14
103 G14
O
Address Bus Bit 14. See description of A12.
A15
104 G13
O
Address Bus Bit 15. See description of A12.
A16
105 G11
O
Address Bus Bit 16. See description of A12.
A17
106 F14
O
Address Bus Bit 17. See description of A12.
A18
107 F12
O
Address Bus Bit 18. See description of A12.
A19
108 F13
O
Address Bus Bit 19. See description of A12.
A20
109 F11
O
Address Bus Bit 20. See description of A12.
A21
110 E14
O
Address Bus Bit 21. See description of A12.
A22
112 E13
I/O
Address Bus Bit 22. When the 403GC is bus master, this is an
address output from the 403GC. When the 403GC is not bus mas-
ter, this is an address input from the external bus master, to deter-
mine page crossings.
A23
113 E11
I/O
Address Bus Bit 23. See description of A22.
A24
114 D14
I/O
Address Bus Bit 24. See description of A22.
A25
115 D12
I/O
Address Bus Bit 25. See description of A22.
A26
116 D13
I/O
Address Bus Bit 26. See description of A22.
A27
117 C14
I/O
Address Bus Bit 27. See description of A22.
A28
118 C12
I/O
Address Bus Bit 28. See description of A22.