Intel J1750 FH8065301562600 Manual Do Utilizador
Códigos do produto
FH8065301562600
PCU – iLB – Low Pin Count (LPC) Bridge
1186
Datasheet
24.3
Use
24.3.1
LPC Clock Delay Compensation
In order to meet LPC interface AC timing requirements, a LPC clock loop back is
required. The operation of this loop back can be configured in two ways:
required. The operation of this loop back can be configured in two ways:
1. On the processor: In this configuration, ILB_LPC_CLK[0] is looped back on itself on
the processor pad.
a. Benefit:
ILB_LPC_CLK[0] and ILB_LPC_CLK[1] are both available for system clocking
b. Drawback:
Clock delay compensation is less effective at compensating for mainboard delay
c. Soft Strap & Register Requirements:
Soft Strap LPCCLK_SLC = 0b
Configuration is reflected by register bit LPCC.LPCCLK_SLC=0b
Soft Strap LPCCLK1_ENB = 0b (ILB_LPC_CLK[1] disabled) or 1b (ILB_LPC_CLK[1]
enabled)
enabled)
2. Configuration is reflected by register bit LPCC.LPCCLK1EN=0b (ILB_LPC_CLK[1]
disabled) or 1b (ILB_LPC_CLK[1] enabled)
3. On the main board: In this configuration, ILB_LPC_CLK[0] is looped back to
ILB_LPC_CLK[1] on the main board.
a. Benefit:
Clock delay compensating in more effective at compensating for main board delay
b. Drawback:
Only ILB_LPC_CLK[0] is available for system clocking. ILB_LPC_CLK[1] must be
disabled.
disabled.
c. Soft Strap & Register Requirements:
Soft Strap LPCCLK_SLC = 1b
Configuration is reflected by register bit LPCC.LPCCLK_SLC=1b
Soft Strap LPCCLK1_ENB = 0b (ILB_LPC_CLK[1] disabled)
Configuration is reflected by register bit LPCC.LPCCLK1EN=0b