參數(shù)資料
型號(hào): MCHRC705KJ1CDWE
廠商: Freescale Semiconductor
文件頁數(shù): 69/108頁
文件大小: 0K
描述: IC MCU 8BIT 64 BYTES RAM 16-S0IC
標(biāo)準(zhǔn)包裝: 47
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 4MHz
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 10
程序存儲(chǔ)器容量: 1.2KB(1.2K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
包裝: 管件
MC68HC705KJ1 MC68HRC705KJ1 MC68HLC705KJ1 Data Sheet, Rev. 4.1
Freescale Semiconductor
63
Chapter 7
Parallel I/O Ports (PORTS)
7.1 Introduction
Ten bidirectional pins form one 8-bit input/output (I/O) port and one 2-bit I/O port. All the bidirectional port
pins are programmable as inputs or outputs.
NOTE
Connect any unused I/O pins to an appropriate logic level, either VDD or
VSS. Although the I/O ports do not require termination for proper operation,
termination reduces excess current consumption and the possibility of
electrostatic damage.
Addr.
Register Name:
Bit 7
654321
Bit 0
$0000
Port A Data Register (POR-
TA)
Read:
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Write:
Reset:
Unaffected by reset
$0001
Port B Data Register
(PORTB)
Read:
0
See Note
PB3
PB2
See Note
Write:
Reset:
Unaffected by reset
$0004
Data Direction Register A
(DDRA)
Read:
DDRA7
DDRA6
DDRA5
DDRA4
DDRA3
DDRA2
DDRA1
DDRA0
Write:
Reset:
00000000
$0005
Data Direction Register B
(DDRB)
Read:
0
See Note
DDRB3
DDRB2
See Note
Write:
Reset:
00000000
$0010
Port A Pulldown Register
(PDRA)
Read:
Write:
PDIA7
PDIA6
PDIA5
PDIA4
PDIA3
PDIA2
PDIA1
PDIA0
Reset:
00000000
$0011
Port B Pulldown Register
(PDRB)
Read:
Write:
See Note
PDIB3
PDIB2
See Note
Reset:
000000
= Unimplemented
Note:
PB5, PB4, PB1, and PB0 should be configured as inputs at all times. These bits are available for read/write but are not
available externally. Configuring them as inputs will ensure that the pulldown devices are enabled, thus properly termi-
nating them.
Figure 7-1. Parallel I/O Port Register Summary
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