Samsung KS57C2308 Manual page 46

MEMORY MAP
Address Register
FF0H Port 0
FF1H Port 1
FF2H Port 2
FF3H Port 3
FF4H Port 4
FF5H Port 5
FF6H Port 6
FF7H Port 7
NOTES:
1. Bit 3 in the WMOD register is read only.
2. "U" means that the value is unknown.
3. The carry flag can be read or written by specific bit manipulation instructions only.
REGISTER DESCRIPTIONS
In this section, register descriptions are presented in a consistent format to familiarize you with the
memory-mapped I/O locations in bank 15 of the RAM. Figure 4-1 describes the features of the register
description format. Register descriptions are arranged in alphabetical order. Programmers can use this section as
a quick-reference source when writing application programs.
Counter registers, buffer registers, and reference registers, as well as the stack pointer and port I/O latches, are
not included in these descriptions. More detailed information about how these registers are used is included in
Part II of this manual, "Hardware Descriptions", in the context of the corresponding peripheral hardware module
descriptions.
4-4
Table 4-1. I/O Map for Memory Bank 15 (Concluded)
Memory Bank 15
Bit 3 Bit 2
.3 .2
.3 .2
.3 .2
.3 .2
.3 .2
.3/.7 .2/.6
.3 .2
.3/.7 .2/.6
Locations, FF8H–FFFH, are not mapped.
Bit 1 Bit 0 R/W
.1 .0 R
.1 .0 R
.1 .0 R/W
.1 .0 R/W
.1 .0 R/W
.1/.5 .0/.4 R/W
.1 .0 R/W
.1/.5 .0/.4 R/W
KS57C2308/P2308/C2316/P2316
Addressing Mode
1-Bit 4-Bit
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
8-Bit
No
No
No
No
Yes
Yes