Siemens Ertec 400 Manual page 59

INT_QVZ_PCI_
4
STATE
3 INT_LOSS_STATE
2 INT_LOCK_STATE
PLL_INPUT_CLK_LO
1
SS
0 PLL_LOCK
Note:
Under very rare conditions, in PCI-boot mode, it is possible that the interrupt bit 4 "INT_QVZ_PCI_STATE " in
register "PLL_STAT_REG" will be left "on" after finishing the 1st level boot.
Workaround:
To avoid irritations concerning the interrupt causes it is recommended to reset interrupt bit 4
"INT_QVZ_PCI_STATE" in register "PLL_STAT_REG" at the beginning of 2nd level boot code.
CLK_CTRL_REG
Description Control register for ERTEC 400 clock
Bit No. Name
31..1 ----
0 CLK_CTRL
PM_STATE_REQ_REG
Description Required power state of the PCI host
Bit No. Name
31: 2 ----
1:0 PM_STATE_REQ
PM_STATE_ ACK_REG
Description Current power state of the ERTEC 400
Bit No. Name
31:2 ----
1:0 PM_STATE_ACK
Copyright © Siemens AG 2010. All rights reserved.
Technical data subject to change
Interrupt timeout on the PCI slave
0: Interrupt request is inactive
1: Interrupt request is active
Read/write accessible
Interrupt loss state:
0: Interrupt request is inactive
1: Interrupt request is active
This bit indicates whether the PLL input clock has failed (latching).
Read/write accessible
Interrupt lock state:
0: Interrupt request is inactive
1: Interrupt request is active
This bit indicates whether the PLL was in unlocked state (latching).
Read/write accessible
Loss: Monitoring status of PLL input clock
1: PLL input clock not detected
0: PLL input clock available
This bit indicates the current monitoring status of the PLL input clock.
Read access only
Lock: Engages at operating frequency; status of PLL:
0: PLL is unlocked
1: PLL is locked
This bit represents the current lock state of the PLL.
Read access only
W/R Addr.: 0x4000_2618
Description
Reserved
Enable of AHB clock for PCI bridge.
0: Clock is disabled
1: Clock is enabled
R Addr.: 0x4000_261C
Description
Reserved
Required power state of the PCI host
R/W Addr.: 0x4000_2620
Description
Reserved
Current power state of the ERTEC 400
Page
Default: 0x0000_0001
Default: 0x0000_0000
Default: 0x0000_0000
59
ERTEC 400 Manual
Version 1.2.2