AM6546 datasheet(150/284 Pages) TI

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7.9.3.3 Clock Timing

Tables and figures provided in this section define timing requirements and switching characteristics for clock

signals.

Table 7-12. Clock Timing Requirements

see Figure 7-12

NO.

MIN

MAX UNIT

CLK1

tc(EXT_REFCLK1)

Cycle time, EXT_REFCLK1

18.52

CLK2

tw(EXT_REFCLK1H)

Pulse Duration, EXT_REFCLK1 high

E*0.45(1)

E*0.55(1)

CLK3

tw(EXT_REFCLK1L)

Pulse Duration, EXT_REFCLK1 low

E*0.45(1)

E*0.55(1)

CLK13 tc(MCU_EXT_REFCLK0)

Cycle time, MCU_EXT_REFCLK0

18.52

CLK14 tw(MCU_EXT_REFCLK0H)

Pulse Duration, MCU_EXT_REFCLK0 high

F*0.45(2)

F*0.55(2)

CLK15 tw(MCU_EXT_REFCLK0L)

Pulse Duration, MCU_EXT_REFCLK0 low

F*0.45(2)

F*0.55(2)

(1)

E = EXT_REFCLK1 cycle time.

(2)

F = MCU_EXT_REFCLK0 cycle time.

Figure 7-12. Clock Timing Requirements

Table 7-13. Clock Switching Characteristics

see Figure 7-13

NO.

PARAMETER

MIN

MAX UNIT

CLK4

tc(SYSCLKOUT0)

Cycle time minimum,SYSCLKOUT0

CLK5

tw(SYSCLKOUT0H)

Pulse Duration minimum, SYSCLKOUT0 high

A*0.4(1)

A*0.6(1)

CLK6

tw(SYSCLKOUT0L)

Pulse Duration minimum, SYSCLKOUT0 low

A*0.4(1)

A*0.6(1)

CLK7

tc(OBSCLK0)

Cycle time minimum, OBSCLK0

CLK8

tw(OBSCLK0H)

Pulse Duration minimum, OBSCLK0 high

B*0.45(2)

B*0.55(2)

CLK9

tw(OBSCLK0L)

Pulse Duration minimum,OBSCLK0 low

B*0.45(2)

B*0.55(2)

CLK10 tc(CLKOUT0)

Cycle time minimum, MCU_CLKOUT0

CLK11 tw(CLKOUT0H)

Pulse Duration minimum, MCU_CLKOUT0 high

C*0.4(3)

C*0.6(3)

CLK12 tw(CLKOUT0L)

Pulse Duration minimum,MCU_CLKOUT0 low

C*0.4(3)

C*0.6(3)

CLK16 tc(MCU_SYSCLKOUT0)

Cycle time minimum,MCU_SYSCLKOUT0

CLK17 tw(MCU_SYSCLKOUT0H)

Pulse Duration minimum, MCU_SYSCLKOUT0

high

A*0.4(1)

A*0.6(1)

CLK18 tw(MCU_SYSCLKOUT0L)

Pulse Duration minimum, MCU_SYSCLKOUT0 low

A*0.4(1)

A*0.6(1)

CLK19 tc(MCU_OBSCLK0)

Cycle time minimum, MCU_OBSCLK0

CLK20 tw(MCU_OBSCLK0H)

Pulse Duration minimum, MCU_OBSCLK0 high

B*0.45(2)

B*0.55(2)

CLK21 tw(MCU_OBSCLK0L)

Pulse Duration minimum,MCU_OBSCLK0 low

B*0.45(2)

B*0.55(2)

(1)

A = SYSCLKOUT0 cycle time in MAIN domain; A = MCU_SYSCLKOUT0 in MCU domain.

(2)

B = OBSCLK0 cycle time in MAIN domain; B = MCU_OBSCLK0 in MCU domain.

(3)

C = MCU_CLKOUT0 cycle time.

AM6548, AM6528, AM6546, AM6526

SPRSP52B – DECEMBER 2019 – REVISED JUNE 2021

www.ti.com

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