Rainbow Electronics AT89C51SND1C - Manual (Page 173)

173
AT8xC51SND1C
4109E–8051–06/03
Table 143. SSSTA Register
SSSTA (S:94h) – Synchronous Serial Status Register
Reset Value = F8h
Table 144. SSDAT Register
SSDAT (S:95h) – Synchronous Serial Data Register
Reset Value = 1111 1111b
Table 145. SSADR Register
SSADR (S:96h) – Synchronous Serial Address Register
Reset Value = 1111 1110b
7 6 5 4 3 2 1 0
SSC4 SSC3 SSC2 SSC1 SSC0 0 0 0
Bit
Number
Bit
Mnemonic Description
7:3 SSC4:0
Synchronous Serial Status Code Bits 0 to 4
Refer to Table 136 to Table 128 for status description.
2:0 0 Always 0.
7 6 5 4 3 2 1 0
SSD7 SSD6 SSD5 SSD4 SSD3 SSD2 SSD1 SSD0
Bit
Number
Bit
Mnemonic Description
7:1 SSD7:1
Synchronous Serial Address bits 7 to 1 or Synchronous Serial Data Bits 7
to 1
0 SSD0 Synchronous Serial Address bit 0 (R/W) or Synchronous Serial Data Bit 0
7 6 5 4 3 2 1 0
SSA7 SSA6 SSA5 SSA4 SSA3 SSA2 SSA1 SSGC
Bit
Number
Bit
Mnemonic Description
7:1 SSA7:1 Synchronous Serial Slave Address Bits 7 to 1
0 SSGC
Synchronous Serial General Call Bit
Set to enable the general call address recognition.
Clear to disable the general call address recognition.