EM78451AP EMC [ELAN Microelectronics Corp], EM78451AP Datasheet - Page 12

• Manufacturer Part Number: EM78451AP
• Description: 8-Bit Microcontroller
• Manufacturer: EMC [ELAN Microelectronics Corp]

EM78451
8-Bit Microcontroller
8 •
4.1.8 RA (SPIRB: SPI Read Buffer)
SRB7~SRB0 are the 8-bit data when transmission is completed by SPI.
4.1.9 RB (SPIWB: SPI Write Buffer)
SWB7~SWB0 are the 8-bit data that is waiting for transmission by SPI.
4.1.10 RC (SPIS: SPI Status Register)
TM1IF (bit 4):
1 = In timer1 mode, receiving completed, and an interrupt occurs if enabled.
0 = In timer1 mode, receiving not completed, and an interrupt does not occur.
OD3 (bit 3):Open Drain Control bit
1 = Open-Drain enable for SDO,
0 = Open-Drain disable for SDO.
OD4 (bit 2):Open-Drain Control bit
1 = Open-Drain enable for SCK,
0 = Open-Drain disable for SCK.
RBFIF (bit 1): Read Buffer Full Interrupt flag
1 = Receiving completed, SPIRB is fully exchanged, and an interrupt occur if enable.
0 = Receiving not completed; SPIRB has not fully exchanged.
RBF (bit 0):Read Buffer Full flag
1 = Receiving completed; SPIRB is fully exchanged.
0 = Receiving not completed; and SPIRB has not fully exchanged.
4.1.11 RD (SPIC: SPI Control Register)
Address
Address
Address
Address
0X0A SPIRB/RA SRB7
0x0C
0x0B
0x0D
SPIWB/RB
SPIC/RD
SPIS/RC
Name
Name
Name
Name
SWB7
Bit 7
Bit 7
Bit 7
CES
Bit 7
--
SWB6
Bit 6
SPIE
Bit 6
Bit 6
SRB6
Bit 6
--
SWB5
Bit 5
Bit 5
Bit 5
SRO
(This specification is subject to change without further notice)
SRB5
Bit 5
--
TM1IF
SWB4
Bit 4
Bit 4
Bit 4
SSE
SRB4
Bit 4
Product Specification (V1.2) 05.27.2004
SWB3
Bit 3
Bit 3
OD3
Bit 3
SRB3
Bit 3
-
SBRS2 SBRS1 SBRS0
SWB2
SRB2
Bit 2
Bit 2
Bit 2
OD4
Bit 2
SWB1
RBFIF
SRB1
Bit 1
Bit 1
Bit 1
Bit 1
SWB0
SRB0
Bit 0
Bit 0
Bit 0
Bit 0
RBF