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I/O PORTS S3C84E5/C84E9/P84E9
9-2
PORT DATA REGISTERS
Table 9-2 gives you an overview of the register locations of all seven S3C84E5/C84E9/P84E9 I/O port data registers.
Data registers for ports 0, 1, 2, 3 and 4 have the general format shown in Table 9-2.
Table 9-2. Port Data Register Summary
Register Name Mnemonic Decimal Hex Location R/W
Port 0 data register P0 224 E0H Set 1, Bank 0 R/W
Port 1 data register P1 225 E1H Set 1, Bank 0 R/W
Port 2 data register P2 226 E2H Set 1, Bank 0 R/W
Port 3 data register P3 227 E3H Set 1, Bank 0 R/W
Port 4 data register P4 228 E4H Set 1, Bank 0 R/W