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Clocking and System Control
65
SPRUI07–March 2020
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System Control and Interrupts
Figure 1-17. High-Speed Peripheral Clock Prescaler (HISPCP) Register
15 3 2 0
Reserved HSPCLK
R-0 R/W-001
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
(1)
This register is EALLOW protected. See Section 1.5.2 for more information.
(2)
HISPCP in this equation denotes the value of bits 2:0 in the HISPCP register.
Table 1-18. High-Speed Peripheral Clock Prescaler (HISPCP) Field Descriptions
Bits Field Value Description
(1)
15-3 Reserved Reserved
2-0 HSPCLK These bits configure the high-speed peripheral clock (HSPCLK) rate relative to SYSCLKOUT:
If HISPCP
(2)
≠ 0, HSPCLK = SYSCLKOUT/(HISPCP X 2)
If HISPCP = 0, HSPCLK = SYSCLKOUT
000 High speed clock = SYSCLKOUT/1
001 High speed clock = SYSCLKOUT/2 (reset default)
010 High speed clock = SYSCLKOUT/4
011 High speed clock = SYSCLKOUT/6
100 High speed clock = SYSCLKOUT/8
101 High speed clock = SYSCLKOUT/10
110 High speed clock = SYSCLKOUT/12
111 High speed clock = SYSCLKOUT/14
Figure 1-18. Low-Speed Peripheral Clock Prescaler Register (LOSPCP)
15 3 2 0
Reserved LSPCLK
R-0 R/W-010
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
(1)
This register is EALLOW protected. See Section 1.5.2 for more information.
(2)
Check the device datasheet for the valid range of values of this register.
(3)
LOSPCP in this equation denotes the value of bits 2:0 in the LOSPCP register.
Table 1-19. Low-Speed Peripheral Clock Prescaler Register (LOSPCP) Field Descriptions
Bits Field Value Description
(1)
15-3 Reserved Reserved
2-0 LSPCLK
(2)
These bits configure the low-speed peripheral clock (LSPCLK) rate relative to SYSCLKOUT:
If LOSPCP
(3)
≠ 0, then LSPCLK = SYSCLKOUT/(LOSPCP X 2)
If LOSPCP = 0, then LSPCLK = SYSCLKOUT
000 Low speed clock = SYSCLKOUT/1
001 Low speed clock= SYSCLKOUT/2
010 Low speed clock= SYSCLKOUT/4 (reset default)
011 Low speed clock= SYSCLKOUT/6
100 Low speed clock= SYSCLKOUT/8
101 Low speed clock= SYSCLKOUT/10
110 Low speed clock= SYSCLKOUT/12
111 Low speed clock= SYSCLKOUT/14
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