h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 466

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Serial Communication Interface (SCI, IrDA)
Bit 1
CKE1
0
1
Notes: 1. Initial value
15.2.7
Note:
SSR is an 8-bit register containing status flags that indicate the operating status of the SCI, and
multiprocessor bits.
SSR can be read or written to by the CPU at all times. However, 1 cannot be written to flags
TDRE, RDRF, ORER, PER, and FER. Also note that in order to clear these flags they must be
read as 1 beforehand. The TEND flag and MPB flag are read-only flags and cannot be modified.
SSR is initialized to H'84 by a reset, and in standby mode, watch mode, subactive mode, subsleep
mode, and module stop mode.
Rev. 3.00 Jan 18, 2006 page 438 of 1044
REJ09B0280-0300
Bit
Initial value
Read/Write
2. Outputs a clock of the same frequency as the bit rate.
3. Inputs a clock with a frequency 16 times the bit rate.
* Only 0 can be written, to clear the flag.
Serial Status Register (SSR)
Bit 0
CKE0
0
1
0
1
R/(W) *
TDRE
Description
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
Asynchronous mode
Synchronous mode
7
1
R/(W) *
RDRF
6
0
R/(W) *
ORER
5
0
Internal clock/SCK pin functions as I/O port *
Internal clock/SCK pin functions as serial clock
output *
Internal clock/SCK pin functions as clock output *
Internal clock/SCK pin functions as serial clock
output
External clock/SCK pin functions as clock input *
External clock/SCK pin functions as serial clock
input
External clock/SCK pin functions as clock input *
External clock/SCK pin functions as serial clock
input
R/(W) *
FER
4
0
1
R/(W) *
PER
3
0
TEND
R
2
1
MPB
R
1
0
MPBT
R/W
0
0
1
3
3
2