s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 164
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s3c4510b
Manufacturer Part Number
s3c4510b
Description
16/32-bit Risc Microcontroller
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.S3C4510B.pdf
(422 pages)
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SYSTEM MANAGER
SYSTEM CLOCK AND MUX BUS CONTROL REGISTER
CLOCK CONTROL REGISTER (CLKCON)
There is a clock control register in the System Manager. This control register is used to divide the internal system
clock, so the slower clock than the system clock can be made by clock dividing value. In this register, ROM bank
5 address/data MUX. enable control function is included.
4-22
CLKCON
Bit Number
Registers
[19:18]
[15:0]
[16]
[17]
[31]
Clock dividing value
ROM bank 5 wait enable Wait cycle will check the next cycle after a chip selection signal is
ROM bank 5
address/data MUX.
enable
MUX Bus address cycle
Test bit
Offset Address
0x3000
Bit Name
Table 4-18. CLKCON Register Description
Table 4-17. CLKCON Register
R/W
R/W
S3C4510B System Clock source. If CLKSEL is Low, PLL output
clock is used as the S3C4510B internal system clock. If CLKSEL
is High, XCLK is used as the S3C4510B internal system clock.
The internal system clock is divided by this value. The clock
divided is used to drive the CPU and system peripherals. Only
one bit can be set in CLKCON[15:0], that is, the clock deviding
value is defined as 1, 2, 4, 8, 16,... If all bits are zero, a non-
divided clock is used.
activated.
Using multiplex bus at ROM bank 5, this bit must be set to 1.
When address phase of multiplexed bus is not enough long for
external device to receive, address phase can be extended by
setting this bit.(You can see tAC in timing diagram.)
00 = 1 MCLK
01 = 2 MCLK
10 = 3 MCLK
This bit is for factory use only. During the normal operation, it
must always be 0.
Clock control register
Description
Description
Reset Value
0x00000000
S3C4510B
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