tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 103

• Manufacturer Part Number: tmp88cs38ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Serial Bus Interface Status Register A
Serial Bus Interface Status Register B
SBISRA
(00020H)
SBISRB
(00023H)
SO pin output
Write transmitted data
SCK
Figure 2.9.20 Control Register/Data Buffer Register/Status Register in SIO Mode (2)
Note:
pin output
Figure 2.9.22 The Maximum Data Transfer Frequency in The External Clock Input
SWRMON
(1) Serial clock
“1”
7
7
SIOF
SEF
Set bit7 to 4, bit1 and bit0 in SBISRB to “1”.
a.
1.
2.
SCK
“1”
pin
6
6
Clock source
Internal clock
clock is output to the outside on the
when data transfer starts. When writing (in the transmit mode) or reading (in the
receive mode) data cannot follow the serial clock rate, an automatic-wait function
is executed to stop the serial clock automatically and hold the next shift operation
until reading or writing is complete.
External (SCK = “111”)
ensure shift operation, a pulse width of at least 2-machine cycles is required for
both high and low levels in the serial clock. The maximum data transfer frequency
is 1MHz (fc = 16.0 MHz).
t
Software reset monitor
Serial transfer operating status
monitor
Shift operating status monitor
SCKL
The SCK (Bits 2 to 0 in SBICRA) is used to select the following functions.
In an internal clock mode, any of seven frequencies can be selected. The serial
An external clock supplied to the
, t
a
SCKH
“1”
a
5
5
1
0
t
SCKL
Figure 2.9.21 Automatic Wait Function
a
> 2 tcyc
2
1
“1”
a
t
4
4
3
SCKH
2
a
5
SIOF
Automatic-wait function
a
7
3
3
6
Note: tcyc = 4/fc (in NORMAL mode, IDLE mode)
88CS38-103
8
a
0: During software reset
1: − (Initial)
0: Transfer terminated
1: Transfer in process
0: Shift operation terminated
1: Shift operation in process
7
SEF
2
2
b
b
1
0
SCK
“1”
b
1
1
SCK
2
1
c
b
pin is used as the serial clock. In order to
4
pin. The
SWR
MON
“1”
b
0
0
6
5
b
7
6
b
TMP88CS38/CM38A/CP38A
8
7
SCK
c
1
0
(Initial value: **** ***1)
pin becomes a high level
c
2
1
c
3
2
2007-09-12
Read
Read
only
only