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AK4254 Datasheet(PDF) 10 Page - Asahi Kasei Microsystems |
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AK4254 Datasheet(HTML) 10 Page - Asahi Kasei Microsystems |
10 / 22 page ASAHI KASEI [AK4254] MS0586-E-01 2007/08 - 10 - OPERATION OVERVIEW ■ System Reset In Serial Control Mode (P/S pin= “L”), it is recommended that AK4254 is powered up when the PDN pin= “L”. If the AK4254 is powered up when the PDN pin = “H”, the AK4254 should be reset by the PDN pin = “L” after power up. The control registers are initialized to their default values by resetting. In Parallel Control Mode, resetting by the PDN pin = “L” is not needed when power up. ■ Parallel Control Mode (P/S pin = “H”) The AK4524 is in Parallel Control Mode at P/S pin = “H”. When the AK4524 is in Parallel Control Mode, all registers can not be accessed. Mode PDN pin SEL12-10 pin CVEE1 pin VOUT1 pin Power Down mode L x GND GND H “LLL” GND GND Normal mode H Except for “LLL” -CVDD1 Video signal output (x: Don’t Care) Table 1. VOUT1 mode setting (Parallel Control Mode) Mode PDN pin SEL22-20 pin CVEE2 pin VOUT2 pin Power Down mode L x GND GND H “LLL” GND GND Normal mode H Except for “LLL” -CVDD1 Video signal output (x: Don’t Care) Table 2. VOUT2 mode setting (Parallel Control Mode) (a) Power Down mode (PDN pin= “L”) The AK4524 is in Power Down mode at the PDN pin = “L”. When the AK4524 is in the Power Down mode, the VOUT1-2 outputs are “GND”. (b) Normal mode (PDN pin= “H”) The AK4524 have 7:2 video switches. In Parallel Control Mode, the each input of VOUT1-2 is set by SEL12-10 pins and SEL22-20 pins. SEL12 pin SEL11 pin SEL10 pin VOUT1 pin L L L Off Note: 13) L L H VIN1 L H L VIN2 L H H VIN3 H L L VIN4 H L H VIN5 H H L VIN6 H H H VIN7 Note: 13. When the input setting is “Off”, VOUT1 output is “GND”. Table 3. Input Selector 1 (Parallel Control Mode) |
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