what is the firmware download address

[ftdiyun]

In your website

http://www.espressif.com/en/support/exp ... ted-guide#
Table 4-2. Download Addresses for Non-FOTA Firmware (unit: kB)
it states:
eagle.irom0text.bin 0x40000

In your document
2A-ESP8266__IOT_SDK_User_Manual__CN_v1.4,
table 4-2.
eagle.irom0text.bin 0x10000

2A-ESP8266__IOT_SDK_User_Manual__EN_v1.4
eagle.irom0text.bin 0x40000

May I know which one is really correct?

[ftdiyun]

Also, one more question:

How to erase the whole external flash using tool "ESP_DOWNLOAD_TOOL_V2.4"?