Embedded Solutions
Page 23 of 46
Register Definitions
XM_VATP_BASE
[0x0400] Base Control Register (read/write)
Base Control Register
Data Bit
Description
31–20
Spare
19
PLL SDAT Output
18
PLL S2/Suspend
17
PLL SCLK
16
PLL Enable
15–9
Spare
8
Reset DCM
7
Force Interrupt 1
6
Master Interrupt 1 Enable
5
Force Interrupt 0
4
Master Interrupt 0 Enable
3–0
LED 4–1
FIGURE 14
PMC-XM VIRTEX (ATP) BASE CONTROL REGISTER
LED 4–1: When one of these bits is set to a ‘1’, the corresponding LED will be lit. When
the bit is a ‘0’, the LED will not be lit.
Master Interrupt 0/1 Enable: When this bit is ‘1’, the corresponding interrupt is enabled
(VINT0 or VINT1). When this bit is ‘0’, the interrupt is disabled.
Force Interrupt 0/1: When this bit is ‘1’, and the corresponding interrupt enable is set,
that interrupt will be asserted from the Virtex.
Reset DCM: When this bit is ‘1’, the DCM (Digital Clock Manager) will be manually
reset. When this bit is ‘0’, the DCM will operate normally.
PLL Enable: When this bit is ‘1’, the PLL interface circuit is enabled for reading or
programming the PLL. When this bit is ‘0’, the PLL interface circuit is disabled.
PLL SCLK: This bit is used to clock data into and out of the PLL.
PLL S2/Suspend: This bit is used to select alternative pre-programmed clock
frequencies from the PLL. It is normally set to ‘0’.