MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 89

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

NF — Noise Error Flag
FE — Framing Error Flag
PF — Parity Error Flag
SC0SR2 — SCI Status Register 2
RAF — Receiver Active Flag
SC0DRH — SCI Data Register High
SC0DRL — SCI Data Register Low
R8 — Receive Bit 8
T8 — Transmit Bit 8
MC68HC912B32
MC68HC912B32TS/D
RESET:
RESET:
RESET:
Set during the same cycle as the RDRF bit but not set in the case of an overrun (OR).
Set when a zero is detected where a stop bit was expected. Clear the FE flag by reading SC0SR1 with
FE set and then reading SC0DR.
Indicates if received data’s parity matches parity bit. This feature is active only when parity is enabled.
The type of parity tested for is determined by the PT (parity type) bit in SC0CR1.
Read anytime. Write has no meaning or effect.
This bit is controlled by the receiver front end. It is set during the RT1 time period of the start bit search.
It is cleared when an idle state is detected or when the receiver circuitry detects a false start bit (gener-
ally due to noise or baud rate mismatch).
Read anytime. Write has no meaning or affect.
This bit is the ninth serial data bit received when the SCI system is configured for nine-data-bit opera-
tion.
Read or write anytime.
This bit is the ninth serial data bit transmitted when the SCI system is configured for nine-data-bit oper-
ation. When using 9-bit data format this bit does not have to be written for each data word. The same
value will be transmitted as the ninth bit until this bit is rewritten.
0 = Unanimous decision
1 = Noise on a valid start bit, any of the data bits, or on the stop bit
0 = Stop bit detected
1 = Zero detected rather than a stop bit
0 = Parity correct
1 = Incorrect parity detected
0 = A character is not being received
1 = A character is being received
R7/T7
Bit 7
Bit 7
Bit 7
R8
0
0
0
0
R6/T6
T8
6
0
0
6
0
6
0
R5/T5
5
0
0
5
0
0
5
0
R4/T4
4
0
0
4
0
0
4
0
R3/T3
3
0
0
3
0
0
3
0
R2/T2
2
0
0
2
0
0
2
0
R1/T1
1
0
0
1
0
0
1
0
R0/T0
Bit 0
RAF
Bit 0
Bit 0
0
0
0
0
MOTOROLA
$00C5
$00C6
$00C7
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