UG-498
ADuCM320 Hardware Reference Manual
Rev. C | Page 14 of 196
Clock Dividers Register
Address: 0x40028004, Reset: 0x0200, Name: CLKCON1
Table 6. Bit Descriptions for CLKCON1
Bits
Bit Name
Description
Reset
Access
[15:12]
RESERVED
Reserved.
0x0
R
11
CDD2DCLK
D2DCLK divide bits.
0x0
R
0: D2D_CLK frequency = HCLK frequency.
1: D2D_CLK frequency = half of HCLK frequency.
[10:8]
CDPCLK
PCLK divide bits. PCLK divide bits.
0x2
RW
000: reserved.
001: reserved.
010: DIV4. Divide by 4 (PCLK is quarter the frequency of root clock,
20 MHz). All ADC specifications are based on this setting. Using any other
setting may affect ADC performance.
011: DIV8. Divide by 8.
100: DIV16. Divide by 16.
101: DIV32. Divide by 32.
110: DIV64. Divide by 164.
111: DIV128. Divide by 128.
[7:3]
RESERVED
Reserved. Always returns 0 when read.
0x0
R
[2:0]
CDHCLK
HCLK divide bits.
0x0
RW
000: DIV1. Divide by 1 (HCLK is equal to root clock).
001: DIV2. Divide by 2 (HCLK is half the frequency of root clock).
010: DIV4. Divide by 4 (HCLK is quarter the frequency of root clock).
011: DIV8. Divide by 8.
100: DIV16.Divide by 16.
101: DIV32.Divide by 32.
110: DIV64.Divide by 64.
111: DIV128. Divide by 128.
User Clock Gating Control Register
Address: 0x40028014, Reset: 0x0040, Name: CLKCON5
The user clock gating control register (CLKCON5) is used to control the gates of the peripheral UCLKs.
Table 7. Bit Descriptions for CLKCON5
Bits
Bit Name
Description
Reset
Access
[15:7]
RESERVED
Reserved. Always returns 0 when read.
0x0
R
6
RESERVED
Reserved. Always set to 1.
0x1
RW
5
UCLKUARTOFF
UART clock user control. This bit disables the UCLK_UART clock. It controls
the gate on UCLK_UART in Power Mode 0 and Power Mode 1. In Power Mode 2
and Power Mode 3, the UCLK_UART is always off and this bit has no effect.
0x0
RW
0: clock on
1: clock off
4
UCLKI2C1OFF
I2C1 clock user control. This bit disables the PCLK_I2C1 clock. It controls
the gate on PCLK_I2C1 in Power Mode 0 and Power Mode 1. In Power Mode 2
and Power Mode 3, the I2C1 PCLK is always off and this bit has no effect.
0x0
RW
0: clock on
1: clock off
3
UCLKI2C0OFF
I2C0 clock user control. This bit disables the PCLK_I2C0 clock. It controls
the gate on PCLK_I2C0 in Power Mode 0 and Power Mode 1. In Power Mode 2
and Power Mode 3 the PCLK_I2C0 is always off and this bit has no effect.
0x0
RW
0: clock on
1: clock off
2
RESERVED
Reserved.
0x0
R