参数资料
型号: M34509G4HFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO24
封装: 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24
文件页数: 82/143页
文件大小: 1056K
代理商: M34509G4HFP
4509 Group
Rev.1.03
2009.07.27
page 43 of 140
REJ03B0147-0103
1/8
1/4
1/2
00
01
10
11
Synchronous
circuit
Serial interface counter (3)
SIOF
Serial
interface
interrupt
INSTCK
P02/SCK
SCK
QS
R
MSB Serial interface register (8) LSB
SIN
J11 J10
J13J12
Register B (4)
Register A (4)
TSIAB
TABSI
SOUT
P01/SOUT
P00/SIN
SST
instruction
Internal reset signal
SERIAL INTERFACE
The 4509 Group has a built-in clock synchronous serial interface
which can serially transmit or receive 8-bit data.
Serial interface consists of;
Serial interface register SI
Serial interface control register J1
Serial interface transmit/receive completion flag (SIOF)
Serial interface counter
Registers A and B are used to perform data transfer with internal
CPU.
The pin functions of the serial interface pins can be set with the reg-
ister J1.
Table 14 Serial interface pins
Pin
P02/SCK
P01/SOUT
P03/SIN
Pin function when selecting serial interface
Clock I/O (SCK)
Serial data output (SOUT)
Serial data input (SIN)
Fig. 36 Serial interface structure
Table 15 Serial interface control register
Note: “R” represents read enabled, and “W” represents write enabled.
Note: Even when the SIN pin function is used, the I/O of port P00 is valid.
Even when the SOUT pin function is used, the input of port P01 is valid.
The input of P02 can be used even when SCK is used. Be careful when
using inputs of both SCK and P02 since the input threshold value of SCK
pin is different from that of port P02.
J13
0
1
J11
0
1
Serial interface synchronous clock
selection bits
Serial interface port function selection bits
J12
0
1
0
1
J10
0
1
0
1
Serial interface control register J1
at RAM back-up : state retained
at reset : 00002
J13
J12
J11
J10
Synchronous clock
Instruction clock (INSTCK) divided by 8
Instruction clock (INSTCK) divided by 4
Instruction clock (INSTCK) divided by 2
External clock (SCK input)
Port function
P00, P01,P02 selected/SIN, SOUT, SCK not selected
P00, SOUT, SCK selected/SIN, P01, P02 not selected
SIN, P01, SCK selected/P00, SOUT, P02 not selected
SIN, SOUT, SCK selected/P00, P01,P02 not selected
R/W
TAJ1/TJ1A
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