PCA9641PW datasheet(24/55 Pages) NXP

24 / 55 page

PCA9641

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Product data sheet

Rev. 2.1 — 27 October 2015

24 of 55

NXP Semiconductors

PCA9641

2-channel I2C-bus master arbiter

10. State machines

Fig 10. State machine of downstream bus ownership

Master 0

aaa-008553

M0_GRANT

!M0-lock_req &

M1-lock_req

!M0-lock_req &

M1-lock-req

M0-lock_grant

SWITCH

!M1-lock_req &

M0-lock_req

M1-lock_grant

!M0-lock_req

CIDLE

(M0-lock_req &

!M1-lock_req) ||

(M0-lock_req &

M1-lock_req & priority)

!M1-lock_req

(!M0-lock_req &

M1-lock_req) ||

(M0-lock_req &

M1-lock_req & priority)

M1_GRANT

!M1-lock_req &

M0-lock_req

bus_connect &

bus_init

bus_connect &

!bus_init

smbus_done = 1

bus_init_fail

lock_req &

!bus_connect

M1_INIT

init_done &

!init_fail

M1_CONNECT

!M1-lock_req &

!M0-lock_req

SMBUS_

RESET

POR

smbus_swrst

!smbus_swrst

reset

!M0-bus_req &

!M1-bus_req

bus_req &

!bus_connect

!bus_init_fail

Bus_connect &

!bus_init

bus_connect &

bus_init

Bus_init_fail

Master 0

M0_CONNECT

M0_INIT

PCA9641PW 数据表(PDF) 24 Page - NXP Semiconductors

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PCA9641PW 数据表(PDF) 24 Page - NXP Semiconductors

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