OV3640规格书2008第二版 00table of contents 1 signal descriptions 1-1 2 system level description 2-1 2.1 overview 2-1 2.2 architecture 2-1 2.3 I/O control 2-3 2.4 system clock control 2-4 2.5 SCCB interface 2-4 2.6 power up sequence 2-4 2.7 reset 2-4 2.8 standby and sleep 2-4 3 block level description 3-1