Samsung KS57C2308 manual Register Description Format

KS57C2308/P2308/C2316/P2316

MEMORY MAP

Register and bit IDs

Name of individual

used for bit addressing

bit or related bits

Associated

Register location

Register ID

Register name

hardware module

in RAM bank 15

CLMOD −

Clock Output Mode Control Register

CPU

FD0H

Bit

3

2

1

0

Identifier

Value

.3

.2

.1

.0

RESET

0

0

0

0

Read/Write

W

W

W

W

Bit Addressing

4

4

4

4

CLMOD.3

Enable/Disable Clock Output Control Bit

0

Disable clock output

1

Enable clock output

CLMOD.2

Bit 2

0

Always logic zero

CLMOD.1 - .0

Clock Source and Frequency Selection Control

Bits

0

0

Select CPU clock source

0

1

Select system clock fxx/8 (524 kHz at 4.19 MHz)

1

0

Select system clock fxx/16 (262 kHz at 4.19

1

1

Select system clock fxx/64 (65.5 kHz at 4.19

R = Read-only

Bit value immediately

Bit number in

W = Write-only

following a RESET

MSB to LSB order

R/W = Read/write

Type of addressing

Description of the

Bit identifier used

that must be used to

effect of specific

for bit addressing

address the bit

bit

(1-bit, 4-bit, or 8-bit)

Figure 4-1. Register Description Format

4-5