em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 75

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
Bits 6~5 (TD1~TD0): SDO status output delay time options. When CPU oscillator
6.3.30 Bank0 R2C: SPIS (SPI Status Register)
Bit 7 (DORD): Data transmission order
Bit 4:
Bit 3(OD3): Open Drain control bit
Bit 2(OD4): Open Drain control bit
Bit 1:
Bit 0 (RBF):
6.3.31 Bank0 R2D: SPIR (SPI Read Buffer Register)
Bits 7~0 (SRB7~SRB0): SPI Read Data Buffer
6.3.32 Bank0 R2E: SPIR (SPI Write Buffer Register)
Bits 7~0 (SWB7~SWB0): SPI Write Data Buffer
DORD
SWB7
SRB7
Bit 7
Bit 7
Bit 7
SWB6
SRB6
Bit 6
Bit 6
Bit 6
TD1
0: Shift left (MSB first)
1: Shift right (LSB first)
source uses Fs, it delays 1 CLK time.
Not used, fixed to “0” all the time.
0: Open drain disable for SDO
1: Open drain enable for SDO
0: Open drain disable for SCK
1: Open drain enable for SCK
Not used, fixed to “0” all the time.
Read Buffer Full flag
0: Receiving not completed, and SPIR has not fully exchanged data.
1: Receiving completed, and SPIR has fully exchanged data.
TD1
0
0
1
1
SWB5
SRB5
Bit 5
Bit 5
Bit 5
TD0
TD0
0
1
0
1
EM78F648/644/642/641/548/544/542/541N
SWB4
SRB4
Bit 4
Bit 4
Bit 4
0
SWB3
SRB3
Bit 3
Bit 3
Bit 3
OD3
Delay Time
16 CLK
24 CLK
32 CLK
8 CLK
SWB2
SRB2
Bit 2
Bit 2
Bit 2
OD4
8-Bit Microcontroller
SWB1
SRB1
Bit 1
Bit 1
Bit 1
0
SWB0
SRB0
Bit 0
Bit 0
Bit 0
RBF
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