Samsung KS57C2308 Manual page 47

KS57C2308/P2308/C2316/P2316
Register and bit IDs
used for bit addressing
Register ID
CLMOD
Bit
Identifier
RESET
Value
Read/Write
Bit Addressing
CLMOD.3
CLMOD.2
CLMOD.1 - .0
R = Read-only
W = Write-only
R/W = Read/write
Register name
Clock Output Mode Control Register
3
.3
0
W
4
Enable/Disable Clock Output Control Bit
0 Disable clock output
1 Enable clock output
Bit 2
0 Always logic zero
Clock Source and Frequency Selection Control Bits
0 0
0 1
1 0
1 1
Type of addressing
that must be used to
address the bit
(1-bit, 4-bit, or 8-bit)
Figure 4-1. Register Description Format
Name of individual
bit or related bits
Associated
hardware module
2 1
.2
.1
0 0
W W
4 4
Select CPU clock source
Select system clock fxx/8 (524 kHz at 4.19 MHz)
Select system clock fxx/16 (262 kHz at 4.19
Select system clock fxx/64 (65.5 kHz at 4.19
Description of the
effect of specific
bit
CPU
0
.0
0
W
4
Bit value immediately
following a RESET
Bit identifier used
for bit addressing
MEMORY MAP
Register location
in RAM bank 15
FD0H
Bit number in
MSB to LSB order
4-5