Datasheet

365
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
21.3.2 Signal Names
Depending on the MODE settings, DATA is latched in different internal registers.
When MODE is equal to CMDE, then a new command (strobed on DATA[15:0] signals) is stored in the command
register.
PIO
PGMNCMD Valid command available Input Low Pulled-up input at reset
PGMRDY
0: Device is busy
1: Device is ready for a new command
Output High Pulled-up input at reset
PGMNOE Output Enable (active high) Input Low Pulled-up input at reset
PGMNVALID
0: DATA[15:0] is in input mode
1: DATA[15:0] is in output mode
Output Low Pulled-up input at reset
PGMM[3:0] Specifies DATA type (see Table 21-2) Input Pulled-up input at reset
PGMD[15:0] Bi-directional data bus Input/Output Pulled-up input at reset
Table 21-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level Comments
Table 21-2. Mode Coding
MODE[3:0] Symbol Data
0000 CMDE Command Register
0001 ADDR0 Address Register LSBs
0010 ADDR1
0011 ADDR2
0100 ADDR3 Address Register MSBs
0101 DATA Data Register
Default IDLE No register
Table 21-3. Command Bit Coding
DATA[15:0] Symbol Command Executed
0x0011 READ Read Flash
0x0012 WP Write Page Flash
0x0022 WPL Write Page and Lock Flash
0x0032 EWP Erase Page and Write Page
0x0042 EWPL Erase Page and Write Page then Lock
0x0013 EA Erase All
0x0014 SLB Set Lock Bit
0x0024 CLB Clear Lock Bit
0x0015 GLB Get Lock Bit
0x0034 SGPB Set General Purpose NVM bit
0x0044 CGPB Clear General Purpose NVM bit