参数资料
| 型号： | BU8272GUW-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 5/17页 |
| 文件大小： | 0K |
| 描述： | IC EXPANDER GPIO LSI 35-VBGA |
| 标准包装： | 2,500 |
| 接口： | 串行 |
| 输入/输出数： | 20 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 1.65 V ~ 1.95 V，1.65 V ~ 3.45 V |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-VFBGA |
| 供应商设备封装： | VBGA035W040 |
| 包装： | 带卷 (TR) |
2001 Microchip Technology Inc.
DS30292C-page 11
PIC16F87X
2.0
MEMORY ORGANIZATION
There are three memory blocks in each of the
PIC16F87X MCUs. The Program Memory and Data
Memory have separate buses so that concurrent
access can occur and is detailed in this section. The
EEPROM data memory block is detailed in Section 4.0.
Additional information on device memory may be found
in the PICmicro
Mid-Range Reference Manual,
(DS33023).
FIGURE 2-1:
PIC16F877/876 PROGRAM
MEMORY MAP AND
STACK
2.1
Program Memory Organization
The PIC16F87X devices have a 13-bit program counter
capable of addressing an 8K x 14 program memory
space. The PIC16F877/876 devices have 8K x 14
words
of
FLASH
program
memory,
and
the
PIC16F873/874 devices have 4K x 14. Accessing a
location above the physically implemented address will
cause a wraparound.
The RESET vector is at 0000h and the interrupt vector
is at 0004h.
FIGURE 2-2:
PIC16F874/873 PROGRAM
MEMORY MAP AND
STACK
PC<12:0>
13
0000h
0004h
0005h
Stack Level 1
Stack Level 8
RESET Vector
Interrupt Vector
On-Chip
CALL, RETURN
RETFIE, RETLW
1FFFh
Stack Level 2
Program
Memory
Page 0
Page 1
Page 2
Page 3
07FFh
0800h
0FFFh
1000h
17FFh
1800h
PC<12:0>
13
0000h
0004h
0005h
Stack Level 1
Stack Level 8
RESET Vector
Interrupt Vector
On-Chip
CALL, RETURN
RETFIE, RETLW
1FFFh
Stack Level 2
Program
Memory
Page 0
Page 1
07FFh
0800h
0FFFh
1000h
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