ST62T09CM6 STMicroelectronics, ST62T09CM6 Datasheet - Page 41

• Manufacturer Part Number: ST62T09CM6
• Description: Microcontrollers (MCU) OTP EPROM 1K No Intf
• Manufacturer: STMicroelectronics

Specifications of ST62T09CM6

• Processor Series: ST62T0x
• Core: ST6
• Data Bus Width: 8 bit
• Program Memory Type: EPROM
• Program Memory Size: 1 KB
• Data Ram Size: 64 B
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-20
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: Details

I/O PORTS (Cont’d)
7.5 REGISTER DESCRIPTION
DATA REGISTER (DR)
Port x Data Register
DRx with x = A or B.
Address DRA: 0C0h - Read /Write
Address DRB: 0C1h - Read /Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = D[7:0] Data register bits.
Reading the DR register returns either the DR reg-
ister latch content (pin configured as output) or the
digital value applied to the I/O pin (pin configured
as input).
Caution: In input mode, modifying this register will
modify the I/O port configuration (see
Do not use the Single bit instructions on I/O port
data registers. See
DATA DIRECTION REGISTER (DDR)
Port x Data Direction Register
DDRx with x = A or B.
Address DDRA: 0C4h - Read /Write
Address DDRB: 0C5h - Read /Write
Reset Value: 0000 0000 (00h)
Table 11. I/O Port Register Map and Reset Values
DD7
Address
D7
of all I/O port registers
7
7
(Hex.)
0CCh
0CDh
0C5h
0C0h
0C1h
0C4h
Reset Value
DD6
D6
DRA
DRB
DDRA
DDRB
ORA
ORB
DD5
Register
D5
Label
(Section
DD4
D4
DD3
D3
MSB
MSB
MSB
7.2.5).
7
0
DD2
D2
Table
DD1
D1
6
0
9).
DD0
D0
0
0
5
0
Bits 7:0 = DD[7:0] Data direction register bits.
The DDR register gives the input/output direction
configuration of the pins. Each bit is set and
cleared by software.
0: Input mode
1: Output mode
OPTION REGISTER (OR)
Port x Option Register
ORx with x = A or B.
Address ORA: 0CCh - Read/Write
Address ORB: 0CDh - Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = O[7:0] Option register bits.
The OR register allows to distinguish in output
mode if the push-pull or open drain configuration is
selected.
Output mode:
0: Open drain output(with P-Buffer deactivated)
1: Push-pull Output
Input mode: See
Each bit is set and cleared by software.
Caution: Modifying this register, will also modify
the I/O port configuration in input mode. (see
ble
O7
7
9).
4
0
ST6208C/ST6209C/ST6210C/ST6220C
O6
O5
3
0
Table
O4
9.
2
0
O3
O2
1
0
O1
LSB
LSB
LSB
41/104
0
0
O0
0
Ta-
1