Fujitsu MHN2150AT Manual/User Guide - Page 132
READ BUFFER X'E4, the host system can read up to 512 bytes of data from the buffer.
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Interface (21) READ BUFFER (X'E4') The host system can read the current contents of the data buffer of the device by issuing this command. Upon receipt of this command, the device sets the BSY bit of Status register and sets up for a read operation. Then the device sets the DRQ bit of Status register, clears the BSY bit, and generates an interrupt. After that, the host system can read up to 512 bytes of data from the buffer. At command issuance (I/O registers setting contents) 1F7H(CM) 11110100 1F6H(DH) x x x DV xx 1F5 (CH) xx H 1F4H(CL) xx 1F3H(SN) xx 1F2H(SC) xx 1F1H(FR) xx At command completion (I/O registers contents to be read) 1F7H(ST) 1F6 (DH) H 1F5H(CH) 1F4H(CL) 1F3 (SN) H 1F2 (SC) H 1F1H(ER) Status information x x x DV xx xx xx xx xx Error information 5-56 C141-E120-02EN