Rev. 2.0, 11/00, page 981 of 1037
H'D148: Serial Mode Register SMR1: SCI1
7
C/A
0
R/W
6
CHR
0
R/W
5
PE
0
R/W
4
O/E
0
R/W
3
STOP
0
R/W
0
CKS0
0
R/W
2
MP
0
R/W
1
CKS1
0
R/W
Start-stop synchronous mode
Clock synchronouns mode
0
1
Communication mode
Multiprocessor function is disabled
Multiprocessor format is selected
0
1
Multiprocessor mode
Clock select
Clock select
0
0
CKS0
CKS1
1
0
1
φ
clock
φ
/4 clock
φ
/16 clock
1
φ
/64 clock
8-bit data
7-bit data
0
1
Character length
Note:
*
When 7-bit data is selected, the MSB (bit 7) of TDR is not transmitted,
and LSB-first/MSB-first selection is not available.
Even parity
*
1
Odd parity
*
2
0
1
Parity mode
Notes: 1. When even parity is set, parity bit addition is performed in transmission
so that the total number of 1 bits in the transmit character plus the parity
bit is even. In reception, a check is performed to see if the total number
of 1 bits in the receive character plus the parity bit is even.
2. When odd parity is set, parity bit addition is performed in transmission
so that the total number of 1 bits in the transmit character plus the parity
bit is odd. In reception, a check is performed to see if the total number
of 1 bits in the receive character plus the parity bit is odd.
1 Stop bit
*
1
2 Stop bit
*
2
0
1
Stop bit length
Notes: 1. In transmission, a single 1 bit (stop bit) is added to the end
of a transmit character before it is sent.
2. In transmission, two 1 bits (stop bits) are added to the end
of a transmit character before it is sent.
Parity bit addition and checking disabled
Parity bit addition and checking enabled
*
0
1
Parity enable
Note:
*
When the PE bit is set to 1, the parity (even or odd) specified by the O/E bit
is added to transmit data before transmission. In reception, the parity bit is
checked for the parity (even or odd) specified by the O/E bit.
Bit :
Initial value :
R/W :
Содержание Hitachi H8S/2191
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