SMSC COM20020 Manuale Utente Scaricare il pdf (Pagina 28)

Table 7 - Address Pointer High Register

BIT BIT NAME SYMBOL DESCRIPTION

7 Read Data RDDATA This bit tells the COM20020 whether the following access

will be a read or write. A logic "1" prepares the device for

a read, a logic "0" prepares it for a write.

6 Auto Increment AUTOINC This bit controls whether the address pointer will

increment automatically. A logic "1" on this bit allows

automatic increment of the pointer after each access,

while a logic "0" disables this function. Please refer to

the Sequential Access Memory section for further detail.

5-3 (reserved) These bits are undefined.

2-0 Address 10-8 A10-A8 These bits hold the upper three address bits which

provide addresses to RAM.

Table 8 - Address Pointer Low Register

BIT BIT NAME SYMBOL DESCRIPTION

7-0 Address 7-0 A7-A0 These bits hold the lower 8 address bits which provide

the addresses to RAM.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 59 60

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SMSC COM20020 Manuale Utente Pagina 28