Freescale Semiconductor MPC5200B User Manual
CDM Registers
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
5-17
5.5.7
CDM System Oscillator Configuration Register—MBAR + 0x0218
This register contains the System Oscillator disable bit. The system oscillator is disabled if an external clock source (not a crystal) drives the
oscillator in package pin. The crystal oscillator pad cell is disabled to reduce power consumption (~6mW for system oscillator).
oscillator in package pin. The crystal oscillator pad cell is disabled to reduce power consumption (~6mW for system oscillator).
Bit
Name
Description
0
—
Reserved for test. Write 0.
1–11
—
Reserved for future use. Write 0.
12
mem_clk_en
Memory Clock Enable—controls SDRAM Controller module clocks
Memory Controller IPB_CLK is not controlled by mem_clk_en.
13
pci_clk_en
PCI Bus Clock Enable—controls PCI bus control module clocks
Note: PCI Arbiter and external PCI Bus clocks are not controlled by pci_clk_en.
14
lpc_clk_en
Local Plus Bus Clock Enable—controls LP bus control module clocks
15
slt_clk_en
Slice Timer Clock Enable—controls slice timer module clocks
16
scom_clk_en
BestComm Clock Enable—controls BestComm module clocks
17
ata_clk_en
ATA Clock Enable—controls ATA disk drive control module clocks
18
eth_clk_en
Ethernet Clock Enable—controls Ethernet Controller module clocks
19
usb_clk_en
Universal Serial Bus Clock Enable—controls USB module clock
20
spi_clk_en
SPI Clock Enable—controls SPI module clocks
21
bdlc_clk_en
BDLC Clock Enable—controls BDLC module clocks
22
psc5_clk_en
PSC5 Clock Enable—control clock to the PSC5 module
23
psc4_clk_en
PSC4 Clock Enable—control clock to the PSC4 module
24
psc3_clk_en
PSC3 Clock Enable—control clock to the PSC3 module
25
psc2_clk_en
PSC2 Clock Enable—control clock to the PSC2 module
26
psc1_clk_en
PSC1 Clock Enable—control clock to the PSC1 module
27
psc6_clk_en
PSC6 Clock Enable—control clock to the PSC6 module
28
mscan_clk_en
MSCAN Clock Enable—controls MSCAN module clocks
29
i2c_clk_en
I2C Clock Enable—controls I
2
C module clocks
30
timer_clk_en
Timer Clock Enable—controls timer module clocks
Note: 2 timers for wake-up mode do not have gated clocks.
31
gpio_clk_en
GPIO Clock Enable—controls some GPIO module clocks
Note: GPIO wake-up mode circuitry uses free running IPB_CLK
Note: An enable value of 1 enables the corresponding clock. An enable value of 0 disables corresponding clock.
Table 5-14. CDM System Oscillator Configuration Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
Reserved
Write 0
sy
s_osc
_
disab
le
Reserved
Write 0
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0