mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 314

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Serial Communication Interface (S12SCIV5)
314
Field
ILT
PE
PT
2
1
0
LOOPS
Idle Line Type Bit — ILT determines when the receiver starts counting logic 1s as idle character bits. The
counting begins either after the start bit or after the stop bit. If the count begins after the start bit, then a string of
logic 1s preceding the stop bit may cause false recognition of an idle character. Beginning the count after the
stop bit avoids false idle character recognition, but requires properly synchronized transmissions.
0 Idle character bit count begins after start bit
1 Idle character bit count begins after stop bit
Parity Enable Bit — PE enables the parity function. When enabled, the parity function inserts a parity bit in the
most significant bit position.
0 Parity function disabled
1 Parity function enabled
Parity Type Bit — PT determines whether the SCI generates and checks for even parity or odd parity. With even
parity, an even number of 1s clears the parity bit and an odd number of 1s sets the parity bit. With odd parity, an
odd number of 1s clears the parity bit and an even number of 1s sets the parity bit.
1 Even parity
1 Odd parity
0
1
1
RSRC
0
1
x
Table 10-4. SCICR1 Field Descriptions (continued)
Normal operation
Loop mode with transmitter output internally connected to receiver input
Single-wire mode with TXD pin connected to receiver input
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
Table 10-5. Loop Functions
Description
Function
Rev. 2.2
Freescale Semiconductor